Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e674bf3868829bb…

MALICIOUS

PDF

37.7 KB Created: 2020-08-12 00:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 324619ccfbe1fe7bba90f74ba25f52ed SHA-1: b538f64cb3a71a05d6f6887500a8893afdf40ea4 SHA-256: 7e674bf3868829bb4c340d5cd44b472635294b7b5c674ec26124f5b108540323
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. This suggests a phishing or scam attempt, likely using the 'book' theme to entice clicks. The ML classifier strongly supports the malicious nature of this PDF.

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=cutting+edge+intermediate+book+pdf
    • http://topupiz.racheleherrick.com/uploads/1/3/0/8/130873995/lovisij_karob_wivunovotugem_golebufotiro.pdf
    • http://files.brightstarlifestyle.co.za/uploads/1/3/1/4/131438231/919306.pdf
    • http://dewuden.pmubywendyrose.com/uploads/1/3/0/8/130814328/tetawovarik-buwuremilel-galeluje-sasum.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3016/files/dodetunirusub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/murekubixomoketijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8728/1832/files/bachon_k_islami_naam_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopesutokuvikoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/xirawavaguwikaliket.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/ashab_e_kahf_story_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/14174279649.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/82152011810.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/snowbird_weather_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/koxasukuromiwowoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/17418995005.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/pesuzapelam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3558/files/44842394394.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_off000052d0.bin
eca92c1db2f30c942177d94c19e0b6fe10a180b74be1ee555fa753ff42a2a4e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x52D0 5260 bytes
font_01_sfnt_off00006492.bin
a1f71e75661eb001001bfd928a35e36fc2d84ef1e1e9f01d76541209f4a3a00d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 12116 bytes