Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3f1f8944b26586…

MALICIOUS

PDF

54.5 KB Created: 2020-08-14 03:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eee1b6b75f2ee9811d03536c3c9fdc6e SHA-1: 32f3629a4b349e74afef0dd0719eb9244f36a056 SHA-256: ff3f1f8944b26586a5f7b4dcda71fb38bd14355cf3948a8ba1fb6cb0d02db76c
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'https://ttraff.cc/wb?keyword=iso%2027001%20requirements%20pdf'. This indicates a phishing or scam attempt, likely aiming to direct users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=iso%2027001%20requirements%20pdf
    • http://fatepa.singplayaudiate.com/uploads/1/3/1/0/131070604/dubelo.pdf
    • http://files.edulito.com/uploads/1/3/1/1/131163872/6c044d8622cfe.pdf
    • http://files.galinamilinova.com/uploads/1/3/1/6/131606951/ramen.pdf
    • http://rogole.timgreenleafquarterhorses.com/uploads/1/3/0/7/130739826/04d10.pdf
    • http://files.comptekcomputers.com/uploads/1/3/0/7/130775245/kulonadisawonexawa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/50185604069.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7741/files/sowarefip.pdf
    • https://cdn.shopify.com/s/files/1/0447/8504/1557/files/talali.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/roduvajuzomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/mosunakujufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/70714308666.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/wreck_this_journal_everywhere.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/55896432595.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/financial_accounting_principles_concepts_and_procedures_fac1502.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bewasovenajuwawofitef.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/47571662241.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/anemia_microcitica_hipocromica_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/athlean_x_beaxst.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/zofitivijun.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/21982698615.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096c4.bin
461b827686e10ae43d4812fd0a4320dfc59c2f2455f208d2de2a20e7330c1fff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C4 5412 bytes
font_01_sfnt_off0000a923.bin
98c6b6948ee85e427f53c992a2ec93a85e3ac0d03ffba42b0b6b42394f84398c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA923 10368 bytes

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