Malicious PDF — malware analysis report

Static analysis result for SHA-256 7826f29410719af2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-05 01:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 360b8f2f4e45e4d083702aaf3f8c95f6 SHA-1: 5319d75dcd21858c6e1382ef96c93bb58e74fc33 SHA-256: 7826f29410719af2d34fa75b8a0cc2ac4c66b1806c08322e9f3ded96880552f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking on malicious links. The presence of numerous PDF links indicates an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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=tipos+de+cancer+de+mama+pdf+2020
    • http://files.resonant-bodywork.com/uploads/1/3/1/6/131606260/745258.pdf
    • http://files.newelhunterart.com/uploads/1/3/0/7/130775033/dofosupiri_dejareviferos.pdf
    • http://files.tcmattsandsons.com/uploads/1/3/1/6/131606453/wutukopapi-delasukuwavej-woxavebuwa-xazosomitu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3092/1894/files/57861807904.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/bajap.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/70925052636.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/human_body_systems_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/45938478517.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/66277685211.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/pokepilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/tenokilukoxupazigurusubuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3302/files/80583010626.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/mejubenanobed.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/xiverobasipumuf.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_off00006258.bin
4e7aad2037bf61df27835fed0c2248133802e1c5eb93c41ec343f00a81ba4235
pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 5492 bytes
font_01_sfnt_off000074ee.bin
a2f901d993aeb95914da245cbf3bd3bc41b2021827e85a96b7ce8e47bdeefffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x74EE 10852 bytes