Malicious PDF — malware analysis report

Static analysis result for SHA-256 0644aace089b6fd5…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 10:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36775984da1314e80b6e84b642d2a8b1 SHA-1: cc5e84a0291d076a21f7fe3fd17c12ed6518eb59 SHA-256: 0644aace089b6fd501293bcc499653231e51ef815ea0b41cb49b32aaf2058952
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Agritourism book pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=agritourism+book+pdf
    • http://files.quikbild-international.com/uploads/1/3/0/8/130874566/xajewimutijuzimabimu.pdf
    • http://files.cveducators.org/uploads/1/3/1/4/131438211/bobiwubitilijev.pdf
    • http://files.danavaproductions.com/uploads/1/3/1/4/131438142/kikemamerezoz.pdf
    • http://files.slimprincessholdings.com/uploads/1/3/0/7/130775837/1148533.pdf
    • http://kususe.silveradodance.com/uploads/1/3/0/7/130776046/gasimaxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/dedinomemexido.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/zawupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/tolumobof.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/14012469984.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/sivokibavomasonopeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/28529617918.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/94816079553.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/capillary_blood_collection.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/we_need_to_talk_celeste_headlee.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/zabafodijekidebinavujubis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/garrett_tpe331_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2113/files/xaxulemuli.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_off00005fa6.bin
fb53dfc17cdb5c4a8e9c4e6ef2e872fb655c2913f506462015c1131c954dd0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 5312 bytes
font_01_sfnt_off000071aa.bin
597cb23123987ed78b685b29591cb2f5d1063d69e1d53c525f96fbd6c120b2d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 10740 bytes

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