Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac48504f19ee38a3…

MALICIOUS

PDF

46.8 KB Created: 2020-08-27 22:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc393e712e41de0a4a0476d97e05543 SHA-1: 414d0e6a081f7660f8bbc348eab8a32283839d84 SHA-256: ac48504f19ee38a369172ea2577b9805083aa23d81432c618c680a5d83b10244
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a '7th grade math geometry study guide answers'. This indicates a social engineering lure to direct the user to malicious content. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm techniques. 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=7th+grade+math+geometry+study+guide+answers
    • http://files.harrisendofthetrailranch.com/uploads/1/3/0/7/130776126/rigitifo.pdf
    • http://files.sarajangevine.com/uploads/1/3/1/4/131409508/vevufogero_zusorel_sanapijobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/attack_on_titan_game_tribute.pdf
    • https://cdn.shopify.com/s/files/1/0449/9944/2590/files/avamys_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/4440821509.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/the_beatles_complete_chord_book.pdf
    • https://cdn.shopify.com/s/files/1/0462/1588/9050/files/blue_ribbon_committee_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7358/files/bamomevox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/aggravation_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6463/files/12098574620.pdf
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/besaxomevuzefekarozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/2058/3065/files/lukixinorigube.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/site_analysis_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/100_frases_mas_usadas_en_ingles.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007290.bin
5d00dade4b44c758d01d2497ccfcf0027b1b35c4af09895b17dae380346f3ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 5384 bytes
font_01_sfnt_off000084d9.bin
75e45f39435c57db24376209c1bd25049527203d2d862f340821083b6c6ede80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D9 12884 bytes

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