Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b00310eac5d578…

MALICIOUS

PDF

47.0 KB Created: 2020-08-19 06:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2103a4ec82517f7ecf4d52369760b323 SHA-1: bb4e4b31c5447c33383ff7b6b9a37b28a1280591 SHA-256: 16b00310eac5d578cf04174bc4491da0a6564c98ca5b77bc8240cb2f462088ce
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a search for "Adobe pdf reader wikipedia". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious intent. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the presence of numerous links, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the document structure and embedded URLs suggest a phishing or redirection attempt.

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=adobe+pdf+reader+wikipedia
    • http://figevodud.stdavidsmoorabbin.com/uploads/1/3/1/0/131070847/kekifunafokekab.pdf
    • http://kovis.stewartblackwood.com/uploads/1/3/0/8/130874620/kumipukerovufo.pdf
    • http://files.abaautismservicescentralwest.com/uploads/1/3/1/4/131453432/nofiloxisex-bukuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/comparative_anatomy_of_animals.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/puzexagipotubifabuxuvezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/behavior_modification_in_mental_retardation.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7431/files/cymbalta_dosage_forms.pdf
    • https://cdn.shopify.com/s/files/1/0447/9506/8565/files/pulse_width_modulation_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/9126/1595/files/matutatuwobibijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/tebusekozukeb.pdf
    • https://cdn.shopify.com/s/files/1/0459/5636/6495/files/yify_browser_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/24888767742.pdf
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/13656219887.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/we_beat_the_street_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/fozelokopilu.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_off000073a1.bin
f3d372fe6c6d0c680717a505ef47f0b737445d2f91b0ae342b212ccccc789def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A1 5112 bytes
font_01_sfnt_off00008526.bin
953ff7e23bf6a4f99c1a22a4d8d0c97d3c177f2f90111d02b2138ef73f54431b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8526 13212 bytes

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