Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14f4018cb6c5d74…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 00:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2837bcc99f524443f8d7ccafd28353d7 SHA-1: e81fd6b2590bd0b52ee1974699ef000d400967e2 SHA-256: f14f4018cb6c5d744513b844ace6bdb16cbac928597fe0e5dfee289cfda7dc53
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body also contains numerous links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a deceptive link within the document.

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=pearson+verbal+ability+and+reading+comprehension+pdf
    • http://files.mgckc.org/uploads/1/3/0/7/130775085/mokivomemipaninumij.pdf
    • http://jiluwa.mustlovedogs2.com/uploads/1/3/0/8/130874359/7b277.pdf
    • http://files.bombexnovelties.com/uploads/1/3/2/6/132695543/lizijiwafarujowugane.pdf
    • http://files.theartofawakening.co.uk/uploads/1/3/2/7/132741029/3d46e798d139a.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/personal_cash_flow_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/8556/8925/files/food_vocabulary_exercises_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/sofevajilegirogaparuwimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/wejuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/bonuvodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0496/files/awaken_the_giant_within_tony_robbins.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/nunuzodawesaliwojiju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/pufax.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_off0000641d.bin
08a984ad91c856cce57895417da5fa09be184c4595e8a1e84a64b6732bdfe337
pdf-font-stream PDF embedded font (sfnt) at offset 0x641D 5872 bytes
font_01_sfnt_off000077f6.bin
07eb951184f3c4c2d8cbdd524dee8acc011c93e378970610ad5eb5d0df5a63b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F6 10316 bytes