Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8910679d809e96f…

MALICIOUS

PDF

47.7 KB Created: 2020-08-12 07:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2932cb0f298bcfdc2213012d2319d17 SHA-1: 58a5208c765f89591b1ff0e566086722c021cfbe SHA-256: a8910679d809e96f47a857f6abc91d23cd399ca897f1bf31fd489a12074ededb
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 indicating it links to known malicious redirector infrastructure. The document body text and embedded links, including one to 'ttraff.com', suggest a lure for users seeking a PDF to Word converter. This redirector likely leads to a malicious payload or phishing page. The presence of numerous embedded links, many pointing to Shopify, further supports the SEO-based link farm tactic.

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=pdf+to+word+converter+app+for+pc+download
    • http://files.ccandleco.com/uploads/1/3/2/7/132740288/db91b6ee893ff.pdf
    • http://files.yoganut.org/uploads/1/3/0/7/130739918/fewasamu_buxudapazegigiw_zifatifilatab_gejuziju.pdf
    • http://files.paulmetcalf.net/uploads/1/3/1/3/131384489/xulolivumovo-vizifofep.pdf
    • http://wutevo.rosemondafricanstore.ca/uploads/1/3/1/4/131407227/wumewotisavovasid.pdf
    • http://files.sarah-shines-art.com/uploads/1/3/0/8/130814758/6162942.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/femakevinajur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/artist_bio_sample.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/25900961438.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/acupuncture_points_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0558/files/velixaluritefekaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/linogewafevumedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/89983049781.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/34347072563.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/how_to_play_multiplayer_on_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/spring_framework_beginners_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/xesazug.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_off0000709b.bin
8b2d05952840302afcb8a7a61dafe79464aec9f55b1b1d659e6c6154bbb6655f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 4864 bytes
font_01_sfnt_off0000813c.bin
e36b8ce1f6cd3668a98488447a2840afeb62cb3c08092ef2a63662171b72b581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 9776 bytes
font_02_sfnt_off0000a2c1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C1 4324 bytes

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