Malicious PDF — malware analysis report

Static analysis result for SHA-256 e796e746989c7e98…

MALICIOUS

PDF

42.0 KB Created: 2020-08-09 13:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0e4fea5de5f04596e4c898d6dffc87 SHA-1: d5401bfcaa2532eca33c8c86059dcd4d6847f71f SHA-256: e796e746989c7e982d725bdee71243ae812ec61a6aa50ecbfe2c7e1e9cbdda05
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector at `ttraff.ru`. The document body text is obfuscated but contains the same lure text as the malicious URL, 'call center benchmarking report pdf'. This suggests the primary goal is to redirect the user to the malicious URL, likely to download further malware.

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.ru/pify?keyword=call+center+benchmarking+report+pdf
    • http://files.temenosjournal.com/uploads/1/3/1/8/131871907/2249632.pdf
    • http://files.confessionsofanerd.com/uploads/1/3/2/7/132740541/4967654.pdf
    • http://files.groepberton.com/uploads/1/3/1/4/131452858/pojesezulajafusemej.pdf
    • http://files.bearlakecounty.info/uploads/1/3/1/4/131437005/9a05bb2.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/senutesepaxar.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/7881477390.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/70040084474.pdf
    • https://cdn.shopify.com/s/files/1/0447/0777/4618/files/lost_veil_anzu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6274/files/sivivanufufidepidito.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/22755872764.pdf
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/33493964395.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/burabuzotifufofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/nivalufuzosimemolemekova.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/fozevodara.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/69298575753.pdf
    • https://cdn.shopify.com/s/files/1/0440/3471/9909/files/nobupelupavonazajuje.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/zitawoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/jerozunazoki.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647b.bin
40008777e640ab0c90451bf854f106215d6122c208d5ac9e185bbd81d1018a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 5500 bytes
font_01_sfnt_off000076f8.bin
3adb22e09b37fc1a1ad5061a83568e09e7945c7cf60610e3aec8b2d0eb81e3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 10604 bytes

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