Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7677e158abbba1…

MALICIOUS

PDF

37.8 KB Created: 2020-09-05 04:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 029a0140eb17235cdefeda90298eafa4 SHA-1: 0557d1909f2fdaf2bf1e47487f99c8847fddd8a7 SHA-256: 6f7677e158abbba111fa44980e51d796e13987e2e2ef24adda2d2675e02a155a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'Carrier aircon manual', likely to trick users into clicking the malicious link. The presence of numerous other PDF links suggests a link farm or SEO manipulation tactic.

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.me/wix?keyword=carrier+aircon+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/freeze_row_google_sheets_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/xeketuzoxurakage.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/fevesavitufigoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/ruzitotuvefujezizadanumor.pdf
    • https://static.usrfiles.com/ugd/95089d_ac844fe299ff4b9d98a4c3e428a0770c.pdf
    • https://static.usrfiles.com/ugd/d94ae5_66b925b04a38442db4ae34e9144dee2b.pdf
    • https://static.usrfiles.com/ugd/15cd4d_8f52b1ead3a340e1bdce27cb252030a6.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/anemia_falciforme_e_valina.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9515/files/83781792826.pdf
    • https://cdn.shopify.com/s/files/1/0437/9351/4645/files/free_tax_invoice_template_excel_australia.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/87503024044.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/62528415598.pdf
    • https://static.usrfiles.com/ugd/b8c837_9585a4372f034e088ff4e54519a577d5.pdf
    • https://static.usrfiles.com/ugd/9e41f0_773aa3b0bab143bbb586a7953c33e6ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f4337d527b0459bb485e190405982be.pdf
    • https://static.usrfiles.com/ugd/565485_ceb0b870be714abc90b8ca3da2852fd1.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a14.bin
d6776d3ca12b681df353454e2391d21628a671922449302cb08f0d120cb851f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A14 4672 bytes
font_01_sfnt_off000069da.bin
f8c7f4b8b1cea4b7b557ae46d8875eb8380fda23bd8c1e4a73994965949ee9ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 9676 bytes