Malicious PDF — malware analysis report

Static analysis result for SHA-256 a358e9e996f83fba…

MALICIOUS

PDF

39.6 KB Created: 2020-08-06 04:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73e39a6d8430741073b30da7d179c8f8 SHA-1: 5f42599803a8402238f34e8cd8d07cdd4a36d51a SHA-256: a358e9e996f83fba3b77971f71c5c0fdf6e213c568351f05f3deefd67627749a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to lure users to malicious sites. The presence of numerous Shopify-hosted PDFs, while individually benign, contributes to the overall link farm strategy. No scripts were extracted, limiting the analysis to the URL redirection aspect.

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.com/pify?keyword=cauda+equina+syndrome+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf In PDF document text
    • http://files.lose-weight--faster.com/uploads/1/3/2/6/132695576/megasurufaz.pdfIn PDF document text
    • http://files.intimatelyyoursweddings.com/uploads/1/3/2/6/132682171/jifuno.pdfIn PDF document text
    • http://files.bertmccoy.com/uploads/1/3/1/3/131383510/milila.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/46860546375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8140/0469/files/44494079077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/rinoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/jebegowidatenilomomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/la_seine_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/81545262520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/kalunafizogogeriwilufabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/74434504188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/barycentre_premire_s.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/96784298586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/pororubifavoxoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/70676787975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/police_academy_full_movie.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF2 5288 bytes
SHA-256: 4abb36ec2240c332fc7164cb3e6ac6e07e4cdece95b3bcf310e6fb537715a726
font_01_sfnt_off00005dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 6180 bytes
SHA-256: e03d3b8c71436d1606c43b02615845da980993065cea919b1251dbbbae8c5612
font_02_sfnt_off00006ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 9884 bytes
SHA-256: 8a372cb4951dfc3f91baee456640fcc3d13d65de8f90ec2b67c6e27267eebb80