Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fdd01efd145e0e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 04:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db9fc96f54314014ef49b0c5a6d80262 SHA-1: b142a8ef13d9a5ac0bc09740468d39dada6fd980 SHA-256: d9fdd01efd145e0e9ce635393302aee0447f1be5830fb2d39f5facaa6a049e54
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to redirect the user to malicious infrastructure, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.ru/pify?keyword=%25C4%2587wiczenia+czasy+tera%25C5%25BAniejsze+angielski+pdf
    • http://files.berghutteskiclub.com/uploads/1/3/1/4/131484133/nawiro.pdf
    • http://files.transactionbankingacademy.com/uploads/1/3/1/6/131607075/9288390.pdf
    • http://files.unadane.org/uploads/1/3/1/4/131453990/xivaselex-pasulutigu-zoxokax.pdf
    • https://cdn.shopify.com/s/files/1/0438/3866/8965/files/canon_5d_mark_iii_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0438/0871/9005/files/61751157515.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/64262950603.pdf
    • https://cdn.shopify.com/s/files/1/0431/8248/9762/files/xokufeveriles.pdf
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/floodgate_alistair_maclean.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/fusoxujulixubatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/58903053293.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1115/files/definicion_de_cualidades_fisicas.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/dms._vizio._com_link.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/24035443088.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/61079445753.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_off000061e0.bin
ffe6c93ef1329a92f254c45b91bd8f6b72a43ffb5893dd473a4fb815321e6d18
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 5820 bytes
font_01_sfnt_off00007597.bin
1007dad025052be2a71e478183ad05b331211b32eeb0e348d719d074ce4e8c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 11452 bytes