Malicious PDF — malware analysis report

Static analysis result for SHA-256 6628e176f5aff523…

MALICIOUS

PDF

57.5 KB Created: 2020-08-19 11:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7631509d7819f1808e928b573ce2a97d SHA-1: d6fb84e6f7856472b05fc6c0821420f0c2bbb470 SHA-256: 6628e176f5aff52391c4397c568e33ed13052b85755df6d4d4f86f3d3a622d6e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. This indicates a phishing or scam attempt, likely to trick users into downloading further malware or visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bhalu+ka+game+ing In PDF document text
    • http://vikewa.dalymanningopticians.com/uploads/1/3/2/7/132740954/xegojidek_wedepumibu.pdfIn PDF document text
    • http://dixuz.grasart.com/uploads/1/3/2/6/132681556/201615.pdfIn PDF document text
    • http://files.patrickx.net/uploads/1/3/1/6/131637218/susiduvaleta-lodunapodoxa-notum.pdfIn PDF document text
    • http://files.lindabutlerphoto.com/uploads/1/3/1/4/131406621/xekopemazavivukazil.pdfIn PDF document text
    • http://files.personalhibachichef.com/uploads/1/3/1/3/131380591/fopopodazodaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/4894327344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0221/5069/files/1585368481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/faguzorebirufara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/tugomasuvaderatulafinuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/tawirobedufuxopafevalon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7271/files/29315538395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/77115704298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/govoralekazagixat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7489/3477/files/kojab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/zirajuluwudegavugoder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/81092912664.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 6384 bytes
SHA-256: 25c0bba19f432c36329fcb92034f94dd10b488a4dce69aacc8c0eb5d101bf100
font_01_sfnt_off00007e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E34 4940 bytes
SHA-256: 6124eb39f3f679d0203aa7a4f6592b21148676278f487a7ba5578b13c36fd7cf
font_02_sfnt_off00008edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDB 3708 bytes
SHA-256: 1cf92465fee85251f4a6190cae0c8d80404579042799ed05d0cb87c1995d5c46
font_03_sfnt_off00009d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D74 10436 bytes
SHA-256: 453ebb95ebbef3bd136e894197b5da34fe5756a49a289521d1dd4bb042b6970f
font_04_sfnt_off0000c14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14F 6560 bytes
SHA-256: 6152378feb341f673791f6773405d004d142f1e9da674925fc1ce085708933e5