Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07bdd427a7d17c2…

MALICIOUS

PDF

56.4 KB Created: 2020-08-09 17:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b73a66835f8da5e2f16122b2d33254 SHA-1: b8d94ab0933c0b76470b4195b6bfc98c2abaed08 SHA-256: f07bdd427a7d17c2cbcb857a2a65a5cd9946510dc18cf995c97ffd7358b2d86f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=tipos+de+angulos+geometria+pdf', which is also listed as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs. This suggests a tactic to distribute malicious links or content through a seemingly innocuous PDF.

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=tipos+de+angulos+geometria+pdf
    • http://files.drkesconcrete.com/uploads/1/3/2/3/132303068/xivapexur-benuxojoxaw-pezesavuruza-zodonozaxu.pdf
    • http://files.phillipsburgcomiccon.com/uploads/1/3/1/8/131856569/jumagepapije_nixonuzuxi_fawiwa.pdf
    • http://files.ihbhawaii.com/uploads/1/3/1/3/131380627/tedif-ketoxareseso-gebira-rexilunuvefajox.pdf
    • http://pixigagur.kwenchjuicetucson.com/uploads/1/3/1/3/131398140/gukixegegudazew.pdf
    • http://files.kingwoodmusikgarten.com/uploads/1/3/1/3/131384401/9337632.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/26700621074.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5413/files/infosphere_data_architect.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/bonaparte_s_retreat_line_dance.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/40425884758.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/36135081434.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/29488405157.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/85227068522.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/surat_al_kahfi_latin_dan_artinya.pdf
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/spatial_autocorrelation_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/zewutewi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/romazicon_davis.pdf
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/sosonukafaroteb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/31752247329.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080d6.bin
caa4c8dcab77ba123cb4e403a9902feb91252aa41a4757f6fba25b5133ea2463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 5308 bytes
font_01_sfnt_off000092cc.bin
e9255b6f8118d7d9fdcfff2b0a15bb3d1cc665fb25d01107daced59a9f9c9200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CC 13104 bytes
font_02_sfnt_off0000bc72.bin
73a4d67f67600199fd6d28dfa25affb1ca65c2fa46a75880e172e4fa2e0cd25a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC72 16316 bytes

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