Malicious PDF — malware analysis report

Static analysis result for SHA-256 027168d835fa4e77…

MALICIOUS

PDF

40.0 KB Created: 2020-08-27 17:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49aaa00cf26bc62eae5befdbaae64b17 SHA-1: c55dd90555f8655fa101763df41df3498adf3b41 SHA-256: 027168d835fa4e779e3843debfb4ceae0632c7fce4796efb4a119ae354ef2edd
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector infrastructure, specifically 'ttraff.com', which is flagged as malicious. The document body, though partially corrupted, contains the text 'Cannot manage active directory certificate services' and a URL that appears to be part of a link farm designed to attract traffic. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to distribute content or lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=cannot+manage+active+directory+certificate+services
    • http://files.morningrosehouston.com/uploads/1/3/0/9/130969169/75961a.pdf
    • http://welodak.generationxgoesglobal.com/uploads/1/3/2/6/132695643/jofepoxidoma_sogekomumu_ludeliz_vuroju.pdf
    • http://files.tmichaelstone.com/uploads/1/3/1/8/131871952/09e21c4bc4086.pdf
    • http://files.fairwindsvilla.com/uploads/1/3/1/6/131637919/xuvid_titokolevotaze.pdf
    • http://zurunuje.reveriewatches.com/uploads/1/3/1/6/131636813/dokafalizojulomuzog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9093/files/tomiwowefinosoginogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/acdelco_brake_pads_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/21755182015.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/21467398227.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/putting_on_sunglasses_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/77862301861.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/the_ascents_of_james.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/performance_appraisal_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/95195079840.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_off000050a2.bin
a91f842ed599731e5ad66a30715487b25cdada6ae48c75fa29de10982a9d5d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A2 5284 bytes
font_01_sfnt_off0000628f.bin
88d17fafbc9abab9776b7a0b71d8d318c2d71fa7f8f75a468317d9be3c9b7d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 9988 bytes
font_02_sfnt_off000084d6.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D6 4324 bytes

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