Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaa3e769ed05080…

MALICIOUS

PDF

44.6 KB Created: 2020-08-15 03:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2679f5aeed739eb0b3734f7f22edf69f SHA-1: 711a3d4f888a2d16bf8e01316243f5c9cd2228fe SHA-256: fdaa3e769ed05080fa477fb2890160820bdd4284f77a88eb13e55a4c2e1001f8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a search result for a common technical issue. This suggests a phishing or scam attempt to direct users to malicious infrastructure. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of further payload delivery or persistence mechanisms.

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=bt+home+hub+5+slow++speed
    • http://files.treasuremeworld.com/uploads/1/3/1/0/131070866/getinog.pdf
    • http://files.cedarbluffhoa.com/uploads/1/3/1/6/131606733/2899697.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/alternator_working_principle_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/gukikikezilew.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/81459610589.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2593/files/exercicios_resolvidos_capacitores.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/wawizorapufane.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/gakabaxiregixogapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/frontline_magazine_march_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/69350142626.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/timevejewitubarugaviposo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/17615280833.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/75667848266.pdf
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/auditoria_financiera_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/dituguvagidodagasakadubil.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/travelling_wave_tube.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_off00007097.bin
d3335a79d8f7332ae6d72268b2b85cf698353fa48a2a70bf5c4ba77b63eb0ca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 5296 bytes
font_01_sfnt_off0000828f.bin
acd90b2fbaf4ef3d8465c89dedf55588a1f90a4972b574d21fa920164a9a43c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x828F 10304 bytes