Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79737a5182e5c5b…

MALICIOUS

PDF

47.8 KB Created: 2020-08-06 23:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1087118af92d2da4b2414c89ce072a98 SHA-1: 09a68d1e6fff6adf09783009a32db4e2eef69a89 SHA-256: f79737a5182e5c5bafd6f85776254f5032855c32a6506424231221f88a98c131
152 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.cc/pify. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=application+of+gis+and+remote+sensing+in+groundwater+management+pdf
    • http://files.agonyopera.com/uploads/1/3/1/3/131383953/zuwojoronofe_texizepujubop_tubofotuv_rorejegi.pdf
    • http://files.stgeorgeseniorsoftball.com/uploads/1/3/1/4/131454012/soteva-gemezalozug.pdf
    • http://files.gotoema.com/uploads/1/3/0/7/130738799/tuzutelojila.pdf
    • http://files.dldtassociates.com/uploads/1/3/1/4/131453944/gezanadaz_rolomaxi_kumejuriweturo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/toon_boom_animate_pro_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/28626005745.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/rupenogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/fetedebawuxalezisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/bonuxigozojufepubadeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/93300134765.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/danusoft_free_keylogger.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8182/files/squat_form_gif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/lavulonijubis.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_off00007cd2.bin
c4d332982f017b6cffa2040a0a7a02c397c68c3e638836906312edd02fc20078
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 5556 bytes
font_01_sfnt_off00008fb7.bin
31f0aaabe14ac642451c1bc266025e594e1ac0b44e555b29286d2d719f992b91
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB7 9920 bytes