Malicious PDF — malware analysis report

Static analysis result for SHA-256 763dcc2547b60b44…

MALICIOUS

PDF

45.1 KB Created: 2020-08-03 18:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89adb17f77a61d8d305fe5118da68ab8 SHA-1: 6686326eead6224a0ff23751b879edb0205fa3b7 SHA-256: 763dcc2547b60b447796c5f10aaec93c74c2518915a1481176e69aae08ceedc9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector, and is flagged as an advance-fee scam lure. The document body, though heavily obfuscated, contains text related to educational notes and a URL that appears to be part of a link farm designed to attract traffic. The presence of multiple external links, some pointing to benign Shopify domains and others to unknown or malicious domains, suggests an attempt to redirect users to potentially harmful content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/pify?keyword=ncert+class+9+biology+notes+pdf
    • http://files.weinstein-math.com/uploads/1/3/1/8/131856543/diniw.pdf
    • http://files.mitalentzcompany.com/uploads/1/3/1/4/131438461/f7b8bbb332.pdf
    • http://files.motherstouchhomehealth.com/uploads/1/3/1/6/131607310/zolotuzulukigawuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/40896164695.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/panchatantra_kannada_stories.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/netikesakafinorejejefoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/44004473182.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5109/files/raspbian_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/sedewobot.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/gubatikowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0962/8570/files/49186017063.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8552/files/buxatepudekegajigoguz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/29563589153.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/doduwasiteniw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/kenmore_he_3_washer.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_off000070e0.bin
f0f623c09c034425f5f50cc4bcbc0d6de49c7788143198db9d90bd14e41af1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 5692 bytes
font_01_sfnt_off0000844c.bin
9d531b0374d4b3147308ca76c659b98bbabc32533c746f68ed9323526a7b7b0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 10196 bytes

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