Malicious PDF — malware analysis report

Static analysis result for SHA-256 be93f1236aca79f7…

MALICIOUS

PDF

55.2 KB Created: 2020-08-25 13:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 429bcf27bddca20a1b7df38a1582d548 SHA-1: 1c75d8b556e8cd7902c16afe0275a28882a54514 SHA-256: be93f1236aca79f7229d1ebcc50e2df38faf0c2625bc4ee01825f49e3ef3f66f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file was identified as malicious due to a critical heuristic firing indicating it contains a mass external PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=navbar+android+developer', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external, potentially malicious, content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=navbar+android+developer
    • http://pupexaw.mhpainting.com/uploads/1/3/0/7/130775455/nozowawaxewo-gemabi-nakasodaj.pdf
    • http://gumufupul.jefferyspicer.com/uploads/1/3/1/4/131453624/xosetizevamedaloref.pdf
    • http://files.claire-crafts.com/uploads/1/3/2/8/132814463/8076740.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/72998728787.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/behavioral_theory_of_smoking.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/8121872287.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/standard_costing_and_variance_analysis_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/91963576564.pdf
    • https://cdn.shopify.com/s/files/1/0438/5567/5552/files/99031837414.pdf
    • https://cdn.shopify.com/s/files/1/0450/8326/3141/files/passive_and_active_voice_exercises_all_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/65570759934.pdf
    • https://cdn.shopify.com/s/files/1/0452/8193/5522/files/25138225322.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/printable_height_chart_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/jojusokibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4448/7836/files/vukokakafirobitunivazumiz.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_off0000836e.bin
c5d57699345104f7bd86ab04d771404db263e24613a624d48db0f1c244e0d2ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 4652 bytes
font_01_sfnt_off0000933c.bin
0a94ae793ee25d0475c89751cf56dab10b04195028db8d79b6219df41ba7b884
pdf-font-stream PDF embedded font (sfnt) at offset 0x933C 14652 bytes
font_02_sfnt_off0000c1b2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B2 4324 bytes