Malicious PDF — malware analysis report

Static analysis result for SHA-256 60922debe3a7fe50…

MALICIOUS

PDF

44.4 KB Created: 2020-08-24 05:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20c76f87b6ede951ea63d762731ec18 SHA-1: 8227a063a69d86bceb9cf3f0ed0039c334fb678a SHA-256: 60922debe3a7fe50c5d70acc87e4e6d3ea9aff21f8c10ba81a0255c7852b277a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating an attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though corrupted, contains keywords related to a news report and also includes the malicious redirector URL, suggesting a lure for phishing or malware distribution. No scripts were extracted, but the presence of numerous embedded links points towards a link-based attack. The primary malicious IOC is the redirector URL.

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=lion+air+boeing+737+max+crash+report
    • http://zufoxebik.alzheimersocclub.com/uploads/1/3/1/0/131070306/66562a31.pdf
    • http://files.strengthindia.org/uploads/1/3/0/7/130739204/simibetatonitilojil.pdf
    • http://files.livingtheadventures.com/uploads/1/3/1/4/131453213/de5155cb72.pdf
    • http://files.paultrothqbu.com/uploads/1/3/1/4/131453695/rapopux-jujan-larazolekat.pdf
    • http://files.hillcresthuntingclubincllc.com/uploads/1/3/1/4/131406800/4590137.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3640/2079/files/fesawijet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/astrology_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3934/9146/files/refokozusoxozosimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0609/8597/files/fur_elise_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/10600368358.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/82421259299.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/hp_coolsense_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/momeratagafelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/46444362183.pdf
    • https://cdn.shopify.com/s/files/1/0457/7266/9084/files/gildan_ultra_cotton_size_guide.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fc8.bin
fbb06f00350e1d9e55f0cddb8d18758ef1c2c1ab379509d74139a20eca162edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 5708 bytes
font_01_sfnt_off00008316.bin
74d8a1ba2b789345e199f223ae4082adb22e4760ce0b25dd1a49dc2eff931ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 9832 bytes

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