Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6c2f4a2ce9ff08…

MALICIOUS

PDF

64.8 KB Created: 2020-08-03 15:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a867c69a84480527acbc857cf70a80d SHA-1: 34f89414d0afde9b67b20205eed114ed85a24b91 SHA-256: 1c6c2f4a2ce9ff08dd5945c926ef4345a5043bf61f2bafb3ce08ffe28612795a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=iodine+deficiency+disorders+pdf'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=iodine+deficiency+disorders+pdf
    • http://files.susanmeehan.net/uploads/1/3/0/7/130739616/dofur_rogur.pdf
    • http://files.longviewpaws.org/uploads/1/3/1/8/131871621/47d5025fd9.pdf
    • http://files.thenewgaeafoundation.org/uploads/1/3/1/6/131637529/kaxuvawojefameguwis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/46963528990.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/vebatuxagosexab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/rovinunulazurigakij.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/fatujasizifojela.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/dabarepesotilikanowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/vudewedazepasugojoletizog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/75910819320.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/tusedezarezuliluxoxofeku.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/92211725285.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/pupevefinogesif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2179/4460/files/25710868411.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/62018503948.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/rumomubikutamizelot.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_off0000bf2b.bin
7afc04a5251ba31dc5c7bc6b9aca6da70560de9d18259f4493a98d5005ec7c5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 4944 bytes
font_01_sfnt_off0000d01f.bin
c5d54e4b3cf47e7150e973e330938aaa19966dd29418d2f299d79fc35327579d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 11416 bytes