Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc704704ef625bb1…

MALICIOUS

PDF

50.6 KB Created: 2020-08-05 17:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d612df784c0d1eda52ea9a325f51e485 SHA-1: 8c2da914b68dee372f297dd47226f7f92a82cd4a SHA-256: dc704704ef625bb10093be27acf5dc8773bfa39dac99835c790f5c9320414e36
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to domains associated with SEO link farms and redirectors, indicating a malicious intent to drive traffic to potentially harmful sites. The primary malicious URL identified is https://ttraff.com/pify?keyword=blechtrommel+pdf+download, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the attack vector. No scripts were extracted from this sample.

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=blechtrommel+pdf+download
    • http://nikude.brendajoycenichols.com/uploads/1/3/2/6/132695384/rijaweraruzugepo.pdf
    • http://jixamana.innerbeanaugusta.com/uploads/1/3/0/7/130739664/pemedaguro-sowerupeganal-tesoxatalejew.pdf
    • http://files.eemnmissionsblog.org/uploads/1/3/0/7/130775306/90dbd648d.pdf
    • http://files.raleighgardiner.com/uploads/1/3/0/7/130776712/lifubi_regizinid.pdf
    • http://files.leilahouston.com/uploads/1/3/0/7/130739837/09ff7a27ed.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/49892063919.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/17450574182.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/51271253725.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/semujoluvazeb.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/rusebage.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/9360554493.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/basefadofanimigelesim.pdf
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/zinitowarafibiburakiveju.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/55417421188.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/85949880694.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/91471189771.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/fajekeliduvafuxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/tosovedosumabuzudowuzule.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_off000084ab.bin
1b44a67a0aa20ff823a1de33b1fad97d16c87551c907e7b782696942030e57ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 5360 bytes
font_01_sfnt_off000096cb.bin
3c9aa33718a18adb40e17d43ff2419f2bced566b0fce8ff538bd7fb7a5ed0125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96CB 11284 bytes

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