Malicious PDF — malware analysis report

Static analysis result for SHA-256 e107ac09de724548…

MALICIOUS

PDF

50.7 KB Created: 2020-08-07 02:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 389c3ffc9e827beb8da21901076dc17e SHA-1: 8ce847efa96442447c2130955daa0ffbe943a2a3 SHA-256: e107ac09de724548c8faafdd2106f5b6c33724e219a3fa8f3eb75f67dd733f68
152 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 pointing to 'https://ttraff.cc/pify?keyword=albinismo+pdf+unam'. Additionally, the PDF exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the malicious intent.

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=albinismo+pdf+unam
    • http://files.rhapsodyartbarn.com/uploads/1/3/2/7/132740515/dowanomexil.pdf
    • http://files.myroncotton.com/uploads/1/3/0/9/130969364/9373256.pdf
    • http://files.yorkhomebrewers.org/uploads/1/3/1/6/131606165/zudupimalaletaz_tulezifazodi_bebojemakav_vozaxip.pdf
    • http://povinuzek.getitfitteddotcarpet.com/uploads/1/3/0/7/130739267/wosolarixu.pdf
    • http://files.willmarccs.com/uploads/1/3/1/3/131380292/zopovuluj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/4776379227.pdf
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/84240263924.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/chief_keef_emoji_joggers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/86934474853.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/84172304305.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musuvagexas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikakaxudote.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/nimelipafosuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/58749787686.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/fanekimirewotemixug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/gokolejulumoledasinelapuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/jakuvujajujuxagirawen.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/1/0433/06

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a8e.bin
b29277ae25c4effa88a24c214e8946f0633327fd6443b6ff521fae90379bd87c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 4904 bytes
font_01_sfnt_off00008b07.bin
780a0e868d067760acde06e17d80800da26ec7ce3f2448bec934b8b6f0189a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B07 11196 bytes
font_02_sfnt_off0000afa1.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA1 4324 bytes

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