Malicious PDF — malware analysis report

Static analysis result for SHA-256 39aa36eba2992f79…

MALICIOUS

PDF

59.3 KB Created: 2020-08-17 11:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f7534f6d53d10c319f480af94fa4e6a SHA-1: d90d3355a9f42442289c707c588a5acbb0883eb6 SHA-256: 39aa36eba2992f79d8fd95a094ced1663323494c2c12b282cb5070549c48bd4b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=angry+birds+movie+trailer+2'. This URL is embedded within the document body, disguised as a movie trailer link. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=angry+birds+movie+trailer+2
    • http://files.jolietcentraldrama.org/uploads/1/3/1/8/131871705/zixutimig_butemowepa.pdf
    • http://jaweporaz.dukesfootball.com/uploads/1/3/2/6/132695471/kagowuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/xoxukagodemawodasivuzeso.pdf
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/jidowumabizeta.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/dragon_magazine_313.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/25148328472.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/english_worksheets_for_elementary_students.pdf
    • https://cdn.shopify.com/s/files/1/0452/1807/0685/files/me6602_automobile_engineering_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/sleep_apnea_patient_education.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/classifying_triangles_and_quadrilaterals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/afsana_khan_all_song.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/wevafogin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/tapuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/budelaxejikom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e0a.bin
76529ce282df03b4bb4d2600873a0809e6e5938e93e3c902bb0b7bbad3522861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0A 5568 bytes
font_01_sfnt_off0000b0db.bin
451660d9099b5b7a961518735af3bbbd9fc8b9513cf5b40421d618a4cb4930e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DB 1948 bytes
font_02_sfnt_off0000ba2b.bin
7c2575a3f5c92cf5833cb529ff9ffd60f907d09b952875dcc336ca77cfdf26ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2B 11036 bytes

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