Malicious PDF — malware analysis report

Static analysis result for SHA-256 06aab92038fe9ba0…

MALICIOUS

PDF

55.9 KB Created: 2020-08-08 06:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f8a10a862c358ba0a893910d403d50 SHA-1: 78aabd1d225f2dcc4959bf1cb659019529d3c050 SHA-256: 06aab92038fe9ba09f675e201f8d3626eb276122015d61cf339a08db7abeebde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to acid rain. This indicates a likely phishing or scam attempt to direct users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a malicious intent.

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=effect+of+acid+rain+on+plants+pdf
    • http://files.lena-nyc.com/uploads/1/3/0/8/130874567/323220.pdf
    • http://zowexel.theopenuniversalist.com/uploads/1/3/0/9/130969332/9065175.pdf
    • http://files.1st-yass-scouts.com/uploads/1/3/1/0/131070089/rolevubixu_nifutukawad_jejelipado_putotuvilamo.pdf
    • http://files.s3arc.com/uploads/1/3/1/6/131637136/9a2c3dff1a69.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/46808176170.pdf
    • https://cdn.shopify.com/s/files/1/0436/6227/8809/files/kuxigupokupol.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/powonukorixotezirepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/vedunodiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6046/9660/files/amlodipine_besylate_davis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71482320097.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/wemizadanaxoven.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/8326116840.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/numorudivigamiwefakum.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/18200161945.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/95914016320.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/58248612865.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/13494446025.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_off00008bd3.bin
3f1e5e58fbed34ab3b38b176e525f3d86e43d1b9d7a4812244089d6650372718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD3 4896 bytes
font_01_sfnt_off00009c76.bin
d728546b17d8d0822a8ed6b1b8d7d00b40794f9e40c37acf8a7bcd86c6f0ab7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C76 12116 bytes
font_02_sfnt_off0000c416.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC416 4324 bytes

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