Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7e1e3f316ee056…

MALICIOUS

PDF

60.0 KB Created: 2020-08-23 22:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc882d756395b9387b018e8e4c2a134d SHA-1: df6933883ebc5c85d0ed24aec3bd69a582e63fcb SHA-256: 2b7e1e3f316ee05640d6ea2660e3665aa43b02d930a1ece3d3ec258d320f708b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=bitlife+all+ribbons+guide'. Another critical heuristic identified a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0433/3728/5797/files/zogulilo.pdf' being the first listed URL. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to a 'Bitlife all ribbons guide' and the authoring application, suggesting a lure to disguise the malicious links.

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=bitlife+all+ribbons+guide
    • http://files.doctorandrewwu.com/uploads/1/3/0/9/130969939/12a34d72c3ad.pdf
    • http://files.dawnlarsenmusic.com/uploads/1/3/0/8/130874278/7760121.pdf
    • http://files.greencoreelectric.com/uploads/1/3/2/7/132740633/f8c92e956200842.pdf
    • http://files.lively.fi/uploads/1/3/0/7/130739895/2307869.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/zogulilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/51832649514.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/avancemos_1b.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/sefatipijifawenademu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/bifuligutodiloxuzezizuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/48_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/pogudatusasusowepobas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/wijululamavaguxuwukoxala.pdf
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/annelida_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/hernia_inguinalis_lateralis_adalah.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_off0000ad0f.bin
e0033f9af9a06c764cfcf0b3c2b47efb45aef1d71e2850d582a930f671c5f850
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD0F 5264 bytes
font_01_sfnt_off0000befb.bin
3394598aa2f3220d29acbd3a3fe67f05182d2711c03a5b0f545b8912f48e9519
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFB 10536 bytes