Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a9e49e7614f69d…

MALICIOUS

PDF

44.8 KB Created: 2020-08-18 17:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1a22b0f2d78c7bca437035ea998c8ac SHA-1: cd12576d53e2a4d087f15f30e6316e343cb58330 SHA-256: 68a9e49e7614f69d1a47ec0c20761330d405f3ce90643adec93891f88cceeea2
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious content under a seemingly technical topic. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=android+ordner+mit+pc+synchronisieren
    • http://files.dmcihomesinc.com.ph/uploads/1/3/2/8/132814468/wogad_dusivop_zekomi_terelofa.pdf
    • http://files.ohanaholistichealth.com/uploads/1/3/1/8/131871499/lalowonezukamor.pdf
    • http://files.callowayfootball.com/uploads/1/3/0/8/130813042/zijogowimabuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/13238068263.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/acidemia_glutarica.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/27417105560.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/beechcraft_baron_58p_poh.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7221/files/car_racing_game_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/sony_bravia_smart_tv_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/kelis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/xajaguxizuzezojikaje.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/79444471368.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/cambridge_international_dictionary_of_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57379697448.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/pixodowejovokapolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/20605181196.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_off00007093.bin
eceec22ca1a75fc0e92d1a63d88d92da7d83589f72d79027e554b273b8a21850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7093 5164 bytes
font_01_sfnt_off000081fa.bin
25ee613b6ea59192e60701ff0592b585457dd207bf9c4a7e9a93452cd1a83119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 10956 bytes

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