Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e6675b2c0f0bad…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 18:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f1725269fd42900bff4a7284549d3d0 SHA-1: d3e2c347d656197a2eaba685c569deaecdfc4da1 SHA-256: 71e6675b2c0f0bad142f96f9a27f16575545048a42fb157f5dce27b9bfe91863
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a malicious redirector, disguised with keywords like 'mcdonald s menu uae pdf'. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests an attempt to create a link farm for SEO poisoning or to distribute further malicious content. No scripts were extracted, but the document's structure and embedded URLs point to a phishing or malware distribution lure.

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.com/pify?keyword=mcdonald+s+menu+uae+pdf
    • http://ruwov.vibrantlifestudio.com/uploads/1/3/1/4/131407406/faluzamikinimisokij.pdf
    • http://files.adirondacktrailsandlodging.org/uploads/1/3/0/9/130970004/2684946.pdf
    • http://supedot.eternalrulers.com/uploads/1/3/2/7/132712615/zuvej-dipolobibogefe.pdf
    • http://files.winnipesaukeeplayhouse.org/uploads/1/3/2/7/132710700/6131578.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/tizadinakisekuxafisipodak.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/bartolinitis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/gegelepalutakiregojewefus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/15979399145.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/63944432676.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/fugedapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/jivotomomowula.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/66358279692.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/towolovoguvarokokob.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/medical_case_study_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/selimax_pulso_bula.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_off00007625.bin
d4a581f8bd7f2e9c95123b643fac3407de805b61a5df30cf0308a009366b7b1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7625 5212 bytes
font_01_sfnt_off000087df.bin
8090c878eb315f13723cbcb9695f98690156ca294a7d314b983e59af1f1ade7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 10292 bytes

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