Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10ddd72f836f8aa…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 18:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1244b1748f9aeadaf37b98cddb1faa06 SHA-1: b3354a0415975d854b59545557c50c62ebc66109 SHA-256: a10ddd72f836f8aa93d90959767110cf52e3f111fea0f35a9f6d89bb765ce6de
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to 'Aarp. org benefits guide 25' and embeds numerous links, including a critical redirector link to 'https://ttraff.ru/pify?keyword=aarp.+org+benefits+guide+25'. This indicates a phishing or scam attempt to redirect users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. 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=aarp.+org+benefits+guide+25
    • http://tagaj.bakerskidscrafts.com/uploads/1/3/0/8/130874493/5741bc.pdf
    • http://files.personalfinancialindependence.org/uploads/1/3/1/1/131163635/wopibobowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/lefilazafofe.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/74386518026.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/73502088737.pdf
    • https://cdn.shopify.com/s/files/1/0435/2684/8661/files/89328648757.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/19663985480.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/nubavawatugamowisuvitoluf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/wakuvuri.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/vireraxati.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/61994273917.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/17188435710.pdf
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/vimukizixosuxaniw.pdf
    • https://cdn.shopify.com/s/files/1/0448/1217/3463/files/wonitawojolex.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/dd_form_1380_field_medical_card.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_off00007276.bin
a71062fadd5cdda4e2e3e305476b56078edacd7d5e4aa214a411be730847b2a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 5592 bytes
font_01_sfnt_off0000858e.bin
72833036f8a2d84e05066ae1e35cb5698b51bd184a75926de2e8b89d10209981
pdf-font-stream PDF embedded font (sfnt) at offset 0x858E 10608 bytes