Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69ab75f10813a01…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 19:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dddc9e707398008428d4c0f7e02d0ef6 SHA-1: dbe36a8b539b21fbd79a2a54255c51dde68415f2 SHA-256: c69ab75f10813a012d9164b0dca33adc9f15e439d1b749479d39e0232cfe26b9
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com' disguised as a free software download, which is flagged as a malicious redirector. The document body and metadata also contain this URL, reinforcing the lure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host numerous external links, likely for SEO poisoning or to distribute further malicious content.

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/wix?keyword=free++autocad+drawing+viewer+software
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/10800098354.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/dexikoninufab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/wimixurotosawoxudopelo.pdf
    • https://cdn.shopify.com/s/files/1/0459/9309/9421/files/cartoon_videos_for_babies.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/veguvapimadev.pdf
    • https://static.usrfiles.com/ugd/e3834b_56c75309c84244498f5afb125b404aa1.pdf
    • https://static.usrfiles.com/ugd/10e3af_c44b9136b15f4115a1fa7f4f09e4bf92.pdf
    • https://static.usrfiles.com/ugd/87a178_5b03e0a3922a4acb99b2419f492e9556.pdf
    • https://static.usrfiles.com/ugd/e3834b_174c15b251404c05bb97d7abd1e65025.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb8444e3457a4832bae96b7ddb14674a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.pdf
    • https://static.usrfiles.com/ugd/8127dd_76d170529703408fa8e1884a14c90406.pdf
    • https://static.usrfiles.com/ugd/dd4472_5fbb1a373b5049c19d654bf086a48051.pdf
    • https://static.usrfiles.com/ugd/b8c837_80314a30d10c4facaac57f5f2912e18e.pdf
    • https://static.usrfiles.com/ugd/aef5b7_ce617c892eb6484295e37a70285b5173.pdf
    • https://static.usrfiles.com/ugd/b8c837_edaa6cb7a74a450c919441e89df33d72.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_off00005f78.bin
632dcc4d96665b630dfab888ed12f57cc5f6f2ce2607e25a74c6c799ff06a183
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 5264 bytes
font_01_sfnt_off0000718a.bin
9c318b0f7f4bd6a30db4f56a0e3a40a02da675c42c1f56553a757ef016ee3848
pdf-font-stream PDF embedded font (sfnt) at offset 0x718A 10208 bytes