Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e57f879a3dcd90…

MALICIOUS

PDF

45.1 KB Created: 2020-07-22 21:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 62d34e44a20dc753ce88fcf2f20f81e7 SHA-1: 9c1c3e8c4457348e40a0026c653c52201a750244 SHA-256: f2e57f879a3dcd90300de84788e0d8c59d9aab76f429c4a88379a0ea45f90c6c
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is the primary attack vector. It also fires for a PDF link farm, indicating a potential SEO poisoning or spamming campaign. The embedded URL leads to a redirector that is likely part of a phishing or malware distribution chain.

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.cc/wb?keyword=design%20basics%20index%20pdf%20download In PDF document text
    • http://files.goldensamurai.net/uploads/1/3/2/6/132695874/fibowidedaven_murodosajoza_zuxemuwas.pdfIn PDF document text
    • http://files.prigitalsolutions.com/uploads/1/3/1/0/131071076/577897.pdfIn PDF document text
    • http://files.greymatternoise.com/uploads/1/3/1/1/131164310/jedun-sonopezixori-miberadunixod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/xigepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/sebabozemezulesiweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/12012452042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/3540861033.pdfIn PDF document text
    • https://bibukexinuf.files.wordpress.com/2020/06/82644133400.pdfIn PDF document text
    • https://pekoradevi.files.wordpress.com/2020/07/64001985965.pdfIn PDF document text
    • https://bowepibikum.files.wordpress.com/2020/06/sidigezusimemepuwewudezim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8988/7396/files/89148310187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/47141045942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/gogijisup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/17382120454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/teratafabavudofosiwaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/ziwejogonazanadaxovetawup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/44574673758.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7254 5236 bytes
SHA-256: db35ab3b66cd5ef8401ee4bff6f305f4abbf806e5958312d3d206256d65ace88
font_01_sfnt_off0000843e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843E 10088 bytes
SHA-256: 339556c71941cdd1f57ae772b9d81ed842f9ad8150e65d2af3d6b3d0da46dd90

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