Malicious PDF — malware analysis report

Static analysis result for SHA-256 887350da6d238ec5…

MALICIOUS

PDF

49.6 KB Created: 2020-08-10 10:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6b62954359534ad15a39c07a34deb86 SHA-1: 4a44a0609a255c9190e692db7595a97acce3d3ff SHA-256: 887350da6d238ec5f24780c2fc74ac5f0f95b5b4887f9932d30e9fce5cad413f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains text related to 'Anglesey road map pdf' and includes the primary malicious URL. The ML classifier strongly flagged this PDF as malicious. The presence of a malicious redirector suggests an attempt to lead the user to a phishing site or a download of 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.cc/pify?keyword=anglesey+road+map+pdf
    • http://files.dewittclintonalumni.com/uploads/1/3/0/7/130740124/lumotineloluwuta.pdf
    • http://files.redmaplepuppies.com/uploads/1/3/0/7/130776183/sipularoxewapozi.pdf
    • http://files.maplephoenix.com/uploads/1/3/2/6/132681767/kuvokabow_bewosukoses_nufojaluvumoz_sifobori.pdf
    • http://files.justallgoodthings.com/uploads/1/3/1/4/131406797/busad_duwumabujer_mixodedoted_motomip.pdf
    • http://files.demsatuva.org/uploads/1/3/0/8/130813639/xefivar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5539/8563/files/paredipinimozavuzudatoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/39149871839.pdf
    • https://cdn.shopify.com/s/files/1/0434/8080/9622/files/48931605844.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/gajidugidemivafejimivavoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/dolusogofukis.pdf
    • https://cdn.shopify.com/s/files/1/0447/8559/8615/files/complicaciones_de_absceso_pulmonar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/4234884733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/labolozejefoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/gorarozidatufuturu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/miwezelototawagimidazapig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/jewunup.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/54090038983.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_off00007a29.bin
19858fe10e694f391fe9888022f2ac9d714c84a1f46fd4036b3ca52d84b3ef97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A29 5452 bytes
font_01_sfnt_off00008caa.bin
2b494139eabca2ea7cb8a74eb755d669d4c67c9897b01106c60b80e172c81c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAA 14660 bytes

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