Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daccf2a96248b1c…

MALICIOUS

PDF

38.7 KB Created: 2020-08-23 18:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7784c45198c76a2bccdec4a43ada68e SHA-1: 982f83ee772bb95b1e4ec1bb03687fd34209cdf6 SHA-256: 6daccf2a96248b1ce40b714084457e4134d63d89e99178f1b7ddf2b13e82e664
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, indicating a link farm or SEO spam tactic. One of the primary links, 'https://ttraff.com/pify?keyword=gorakhpur+ka+weather+report', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify URLs, suggesting a lure to a malicious site. No scripts were extracted, but the presence of a malicious redirector and the link farm pattern strongly suggest an attempt to lead users to 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.com/pify?keyword=gorakhpur+ka+weather+report
    • http://files.ptxsynchro.com/uploads/1/3/1/6/131606262/kuzoxozigajajojiw.pdf
    • http://duzexoxeg.wasiionline.com/uploads/1/3/0/9/130969744/ranejalep_sarogazagunugo_kiwetejivak_tisunag.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.nc2020.org/uploads/1/3/1/0/131071137/garabokozin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/how_to_write_a_motivational_letter_for_a_bursary.pdf
    • https://cdn.shopify.com/s/files/1/0434/7625/4873/files/wepibizoxuwefimijerijafe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/35671502641.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/xobevek.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/goderi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/66111450682.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/tratamento_fisioterapeutico_para_alzheimer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/26064119339.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/mabum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/gibekozixanig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41732402988.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/chevy_cobalt_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/16950541295.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_off00004e9f.bin
30f754e1962b1fe833b7f4075794f90c2974db0702cc7ee5ce2e11544459d839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9F 4612 bytes
font_01_sfnt_off00005e74.bin
382b9c1442c23c77db16976fd1c564ca400bb5f9eb28e0613443a83bdecbf9aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E74 9756 bytes
font_02_sfnt_off00007fda.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 4324 bytes

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