Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d34cebf6d09b1cf…

MALICIOUS

PDF

94.9 KB Created: 2020-08-04 01:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac6625ceea6731bb17ae4f3dabed16c SHA-1: 44e696bd6424e56d7acac6c643f14df44ed37f12 SHA-256: 3d34cebf6d09b1cfc539de78d815af4a839f92eb1c16f7c6c3e6318d0676b6df
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm pattern, with numerous external links, many hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to this external resource.

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=public+administration+course+outline+pdf
    • http://files.micahchristian.org/uploads/1/3/2/6/132695511/depupuxi_zowerepudatipa_pomogukaf_wefamikusote.pdf
    • http://files.vermilionbands.com/uploads/1/3/0/9/130969357/gilenas-denejifesefo-pewajajikidila-woxokapumopus.pdf
    • http://furazix.codycordova.com/uploads/1/3/0/7/130740051/vixemubuj.pdf
    • http://files.myersmindset.com/uploads/1/3/0/7/130775017/jitelufuxes.pdf
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/babebanevoribe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/tutoledexolexuwotun.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/71775725075.pdf
    • https://cdn.shopify.com/s/files/1/0438/5678/9664/files/nifemobasixinij.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/ruxilejewo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0490/files/17068417311.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/biwewurufaweto.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/wobudilonelokima.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/95845593634.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/jufuzame.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/47255640764.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/94250040984.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/nogoganozebajijivisekes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/introduction_to_kinesiology_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/7050/2550/files/98221194641.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_off00011fad.bin
ec00dfce340d17d357a3e9edda24c84a2f75c2f556d8a4a985766a8f959f34ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAD 5324 bytes
font_01_sfnt_off0001319e.bin
9cf9e42d39b5da54202e912ca03a8d3e093b40a61108f22c3845e9fc1cb147c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1319E 14948 bytes
font_02_sfnt_off00015fe5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE5 4324 bytes

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