Malicious PDF — malware analysis report

Static analysis result for SHA-256 f150f842ecbd24a3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-06 11:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd15a5a13370e2214f7226efba23086d SHA-1: d9ba5dc63b23d124c120bbdcf08522d7bfc0239d SHA-256: f150f842ecbd24a36f4698f9c31419a6b638c374ec52bb4554ebabfb9d62f1cb
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=libro+el+almohadon+de+plumas+y+otros+cuentos+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users through deceptive content or SEO tactics to potentially malicious external resources.

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=libro+el+almohadon+de+plumas+y+otros+cuentos+pdf
    • http://files.bikiniusa.com/uploads/1/3/1/4/131453215/8557353.pdf
    • http://files.thebarnatlovefarms.com/uploads/1/3/1/3/131380297/minokipaxo-digobofoxegeg-fupegeladeza.pdf
    • http://files.luciesplace.org/uploads/1/3/0/9/130969357/4c90ae9b287.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/lobab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/5565242576.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/32422240851.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/blest_be_the_lord_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/94055021571.pdf
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/deadlock_recovery_in_operating_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92399027362.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/tebigixizidolugitefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6201/files/addicted_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/best_entourage_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7794/files/82618141307.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/the_nexus_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/gowebuluxemiboxufeti.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_off00006cc8.bin
db2c597d0210786b20232189dc8eebe167dbc9b720ffbb2330b3990013442101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC8 5580 bytes
font_01_sfnt_off00007f9d.bin
d4665b88e560a6e3be6ae88e3db95288edc4e682154e207a45670d685632aba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9D 11544 bytes

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