Malicious PDF — malware analysis report

Static analysis result for SHA-256 1011358ef2095a08…

MALICIOUS

PDF

50.2 KB Created: 2020-08-31 21:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d4e29622aea6fc104fa11802af6fab9 SHA-1: aec040ab83ea6f92ceae3bcd0d0ee2e75d41d040 SHA-256: 1011358ef2095a08c4f9c47dd67b50b2f2094f1b93cc7cf1fe4daf322aec30e0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting an attempt to lure users to malicious content under the guise of construction-related PDFs. The presence of numerous other PDF links further supports this as a link farm 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.com/pify?keyword=building+construction+punmia+pdf+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/gijipuwip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/mozigaponofuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/kizer.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/anthony_giddens_sociology_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/vepiboninuramuwiwiw.pdf
    • https://static.usrfiles.com/ugd/48f461_5554d1401f2b4b699be4974ff0b6be1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4877bc4b4c9941c49c24fecd89eff65e.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/72879966542.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/87653149924.pdf
    • https://cdn.shopify.com/s/files/1/0438/8713/2827/files/siva_manasil_shakthi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/moxudipozipoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/5801653712.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/in_conclusion_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c2f.bin
215953b79c67b92ae2691b9b56542e3080691e2ed692766d2c548dc71ac36d2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2F 5524 bytes
font_01_sfnt_off00007ee2.bin
49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE2 2116 bytes
font_02_sfnt_off000088ad.bin
95e53f6953b9dc84ecc400fda3bde073f9d64996c35f2c6321d8483074b7f75c
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AD 15700 bytes