Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e38ba54072d976…

MALICIOUS

PDF

46.2 KB Created: 2020-07-21 21:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f5e608c7552652da636849a855fc68 SHA-1: b838123d2953136749490e1fb70ec7a8b2194372 SHA-256: 84e38ba54072d97605a32993d0b2004baadf1ae2fa3b43a8d8577e46704ca7ba
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=bulk+density+of+sand+test+pdf'. Another critical heuristic indicates a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0432/5857/7046/files/mojudaroguf.pdf' being a prominent example. The ML classifier also strongly flagged this PDF as malicious. The document body text, though heavily corrupted, suggests a theme related to 'bulk density of sand test pdf', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=bulk+density+of+sand+test+pdf
    • http://files.truvisioncolombia.com/uploads/1/3/1/3/131398075/kixonabunenototekoxu.pdf
    • http://files.hesedyoga.com/uploads/1/3/1/4/131406036/genukulam-kugoxunidub-gojivonep.pdf
    • http://files.yburban.com/uploads/1/3/0/7/130740207/44a2a62723.pdf
    • https://gugepumu
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/mojudaroguf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/nanulegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/7966927168.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/47719246331.pdf
    • https://wotidabupef.files.wordpress.com/2020/07/kifelo.pdf
    • https://gugepumume.files.wordpress.com/2020/07/70475278699.pdf
    • https://gimasesagix.files.wordpress.com/2020/07/wosomelizowafajapetug.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/buxexizevupebopuvobale.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/sezinobogazojisilagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/tamulumasud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/mesapixowekos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/89150817431.pdf
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/48339000129.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/daxapenisajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92283418618.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_off000076a3.bin
0009bb626aed31486e46950a13e67af223beaf789b17a7e525fc968acfa433f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A3 5036 bytes
font_01_sfnt_off000087e0.bin
609594919e99bc3f0e98d905d0fdb27cd86d5cb59593a8564af7e95c2fb5d076
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E0 10404 bytes