Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade804a3dee2771d…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 03:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2376f7dc9579e51e509cd1462a71153e SHA-1: 5e63135fd88f0ed80cd407ddfbcf00f0b179ec23 SHA-256: ade804a3dee2771d7b4967fbb17db8a6391572b6fe5298d20f231df448a0bddd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=present+cabinet+minister+of+odisha+pdf'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=present+cabinet+minister+of+odisha+pdf
    • http://files.pettyharbourmaddoxcove.ca/uploads/1/3/0/8/130874518/9604094.pdf
    • http://files.geralddesiralfinearts.com/uploads/1/3/1/6/131607683/2936123.pdf
    • http://files.innovativestoneconcepts.com/uploads/1/3/1/4/131409677/2303186.pdf
    • http://files.cdbca.com/uploads/1/3/1/1/131164097/pubadejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/31827406842.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/88485715240.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0444/3389/9686/files/lekonapogodivipimumaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/vepexuwebanukuravesezifav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51730359377.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/38199451157.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/69092011464.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/27166727816.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/black_boy_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/absolute_value_inequalities_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000680e.bin
536688c0512db8c0083d59d9ad9cab93da9639de9ed228eb9f043351235a4a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680E 5504 bytes
font_01_sfnt_off00007a89.bin
3ac07b37eeef9bd3daef7393f40836089790b1a5c3d266c94cd3ca3d8eee3988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A89 9852 bytes

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