Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa10290232edc02…

MALICIOUS

PDF

47.9 KB Created: 2020-08-24 10:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6759916d8557509374715b60e2521ee SHA-1: a257d67c39d1c38880b13b864a3b14187319be39 SHA-256: baa10290232edc025f6e9c91d94f9f79893f3ac2443fcbeb35609d91ac6875d2
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary intent is to redirect the user to a malicious site, likely for further exploitation or phishing. The presence of numerous other links to Shopify-hosted PDFs, while many are benign, indicates a link farm strategy to potentially obscure the malicious redirector.

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.cc/pify?keyword=america%2527+s+got+talent+angelica+hale+performances
    • http://files.martyedwardsnd.com/uploads/1/3/0/8/130814308/guvura.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/anatomie_et_physiologie_du_cur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/37129560916.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/nivajaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/37978035588.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2245/files/9861551184.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/wajanukowigoxoliveganod.pdf
    • https://cdn.shopify.com/s/files/1/0429/0271/6572/files/rudram_chamakam_lyrics_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/kanotowabitujewoxip.pdf
    • https://cdn.shopify.com/s/files/1/0461/7820/5850/files/cyclizine_dosage_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/voxevofekepugabobate.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/82413619544.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_off00006e55.bin
d4f1ca6248e0a6dec4ccc5239fb0aecbb71b9c98ec175fc431240bfcc4715a69
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E55 5240 bytes
font_01_sfnt_off00007fed.bin
2db1dce44e98cdbdfd9c950801156e668e4537617a3bc3f3ea688eee4336a36f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FED 11120 bytes
font_02_sfnt_off0000a497.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA497 4324 bytes