Malicious PDF — malware analysis report

Static analysis result for SHA-256 3624d98bda462d75…

MALICIOUS

PDF

33.4 KB Created: 2020-08-03 08:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb9a9362a64e449344e3f8bbf442fc32 SHA-1: 503a61437c73492df79824dbed27d69e6c05af38 SHA-256: 3624d98bda462d75650e05ec1d6b3bc90aff740ea541a797ac088e5c0b2f32f1
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO-based distribution or link farm tactic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=2007+lexus+ls+460+owners+manual+pdf, which is likely used to redirect users to further malicious content. The ML classifier also strongly indicated maliciousness.

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=2007+lexus+ls+460+owners+manual+pdf
    • http://files.gardenclubofthemiddlepeninsula.com/uploads/1/3/2/7/132740377/zuloxovo_sewoxomikuza_zawafakirise.pdf
    • http://files.scsoaventura.com/uploads/1/3/1/4/131437605/zafezadi-kekodekaturef-nilitele.pdf
    • http://files.smithsbeachtransport.com/uploads/1/3/0/7/130740055/7188490.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/suvukupisawanuvaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/xobifelafunetasimoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/jigasejexilepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/6th_pay_commission_wb_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/riwetorevagukega.pdf
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/22378880548.pdf
    • https://cdn.shopify.com/s/files/1/0434/9473/6037/files/74944982572.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/50414433901.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/37345953984.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/vubisadilafiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudogezemolajefenupil.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_off00004465.bin
f9c430b53d183bd3eb77dfa950cef90dcb14ae012820ae17e64b38fde5691bed
pdf-font-stream PDF embedded font (sfnt) at offset 0x4465 5848 bytes
font_01_sfnt_off00005856.bin
7fa6e59f06a4c2503733fa5c4d33ce9e26981b5d998a73d0104172d597941703
pdf-font-stream PDF embedded font (sfnt) at offset 0x5856 9452 bytes