Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3ee09e61a4bcc7…

MALICIOUS

PDF

44.9 KB Created: 2020-08-18 22:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53b835967e02b04d334bbdd8e6ec88b SHA-1: dd5cde3faa8c97c9e4cb1690e0a29346121349ba SHA-256: 5f3ee09e61a4bcc7dabaedcaea929dce96581b70508c159e4c7eb35a0ef1f866
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one pointing to a known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to "damages based agreements" and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to distribute further 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=damages+based+agreements+template
    • http://files.readingsbytara.com/uploads/1/3/0/8/130874231/wijalulipekij.pdf
    • http://files.tobaccobarnfarm.com/uploads/1/3/1/8/131871622/3841211.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/75140386218.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/83097575609.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/88114212433.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/41857312083.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/67499610666.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/reasoning_backwards_gregg_young_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1394/files/sciatic_nerve_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/fesoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/winifosufunul.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/parikaropugawikanamej.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/company_of_heroes_2_soviet_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/adobe_printer_mac.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_off000065d0.bin
ff064178b28d36d5a4eff42c2e6dd7e98768d80ee477ab0f02059bdced6082e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 5048 bytes
font_01_sfnt_off000076d9.bin
934bb14235045c9d51a3c1e6653f525d9f05c2095cc287c34e42653975ab8332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 9860 bytes
font_02_sfnt_off0000988a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x988A 4324 bytes

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