Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5949137a02a986…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 11:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b39e88c02da39362c6dc9e22e3c0b7 SHA-1: 366d7f1246311aa45972f43a6de020a4ab1228c8 SHA-256: 6d5949137a02a986b5b54eb99ae45ee611f4bc9e1fab3b8f4904dd0b07fd7fce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a song title, which redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host 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=adada+adada+unnaipol+devathaye+song++masstamilan
    • http://files.peacecitysoaps.com/uploads/1/3/2/3/132303045/sixaxubijekim_bufis.pdf
    • http://files.roswellorchestra.org/uploads/1/3/2/6/132681307/pupas.pdf
    • http://files.saltysirentradingco.org/uploads/1/3/0/7/130739951/7102795.pdf
    • http://files.marchtomars.com/uploads/1/3/1/6/131606020/xizig.pdf
    • http://wawedev.woodfieldparkbaptistchurch.com/uploads/1/3/0/7/130775518/9290808.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/magic_jelly_bean_keyfinder.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/79811903763.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/kigenijivad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/84398009984.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12247178291.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4337/files/rijubomisunepeboriv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/weight_lifting_for_swimmers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/wrought_iron_fence_designs.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/suzozomepuje.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/lowatopavami.pdf
    • https://cdn.shopify.com/s/files/1/0454/2916/2152/files/chloroform_ko_kaise_use_kare.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.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_off000054eb.bin
0f18d30eaeb64cc761ee21827432566f2332dd0c349d0265763273b55268b825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EB 5428 bytes
font_01_sfnt_off00006746.bin
82a60c6a11391698bfa8120600616c4f31618802b4750ac2eb2d5db598a5ead1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6746 2376 bytes
font_02_sfnt_off000071ab.bin
bfbc58de475d268e9bd8b54e3cb6b8f071a2a7be5d7b281ee14dc18d9a9d72d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 14724 bytes

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