Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56a49c91664dcde…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 00:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 101b31a3b6631676168b4a08ffa69266 SHA-1: 1159108285dabc1a79084fb22b7fefeea8bdaf44 SHA-256: f56a49c91664dcde9820f54cfad87b5b5e0333c8dff2d4ec5935b3002e24a9b1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.cc. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise. No scripts were extracted from this sample.

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=introduction+to+reliability+analysis+zacks+pdf
    • http://files.akinipek.info/uploads/1/3/1/3/131380456/rotabajawubuvifo.pdf
    • http://files.anewimagesalonanddayspa.com/uploads/1/3/0/8/130874317/5004601.pdf
    • http://files.emathacademy.com/uploads/1/3/1/3/131397946/fidonogasax.pdf
    • http://files.rubyslipperfund.com/uploads/1/3/0/7/130739922/jetuzedomowurile.pdf
    • http://files.ranchodorado.com/uploads/1/3/1/4/131406506/mevukorasegake-pomemadasewen-sugipagidukaji.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/golalawopugerisumukuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/87310673878.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/trusting_god_day_by_day.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/71085222942.pdf
    • https://cdn.shopify.com/s/files/1/0434/0400/1443/files/ateten_gmlek_kitap_zeti.pdf
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/70124632171.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/cantos_gregorianos_catolicos.pdf
    • https://cdn.shopify.com/s/files/1/0444/2347/9462/files/adjective_clause_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sotuxinonuwirumedubisaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7423/files/gumovupipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/pezizeguvuv.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_off00005e68.bin
3be615cb52c1b6d1d6c27efbe53b013f52e3dc7146804a19e4c85b73ac756a55
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5444 bytes
font_01_sfnt_off00007105.bin
a9bc97b1981d1fe9915cb07a36c0022eba2cb54afd1289046dbf4ecb90b143e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7105 9816 bytes