Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a84ad0065b719ed…

MALICIOUS

PDF

39.9 KB Created: 2020-08-17 14:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 033729a2903a243a8081896eea5ab723 SHA-1: ebaff73bfc03afe406caf74e701de5d62fd1fcee SHA-256: 0a84ad0065b719ed844b2a88b402d9c9386a6a6c2a5bad6e6c19467705c41302
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive document body and numerous embedded links, with one critical heuristic identifying it as a malicious redirector. Another heuristic flags it as a PDF SEO link farm, indicating a likely attempt to manipulate search results or distribute malicious content. The primary IOC is the redirector URL, which is likely used to funnel victims to malicious sites.

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=kepner+tregoe+decision+analysis+template
    • http://tenunetuk.bimpliciti.com/uploads/1/3/0/7/130776823/xusuwepodovebigod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4984/2850/files/kojivutikokazilukowek.pdf
    • https://cdn.shopify.com/s/files/1/0434/9198/3512/files/candlestick_chart_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/47923978321.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/bach_prelude_2_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/79522079994.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/24946718969.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/xelabapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/almadianos_eiyuuden_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/vezenipuwutevon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/30661114630.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_off00005e17.bin
438ce0799cebf32d2241a839e812d22bb822d5006758a085619a427c4ac0513a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 5464 bytes
font_01_sfnt_off000070a1.bin
dd3133ae2ce3d5bca43bacd3bda0a7fc079fbc3b2231ed06afbc133ee8418907
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 9932 bytes