Malicious PDF — malware analysis report

Static analysis result for SHA-256 d551cc6a59c4e170…

MALICIOUS

PDF

40.7 KB Created: 2020-08-01 14:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f881afcd7b137ddfb0d449a98fa867ed SHA-1: a6968162db8083be60ab1c5271f8e3ddc27b3ce2 SHA-256: d551cc6a59c4e1705b06500fd5a237f86b13eaa08b46256d43a79dda91ce4c05
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a delivery mechanism for malicious content. The primary attack pattern involves luring users to external sites via these links.

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=7+days+to+die+rotting+flesh
    • http://files.newhorizoncounselingctr.com/uploads/1/3/0/8/130813804/58c8de6a2.pdf
    • http://files.northstatekleekai.com/uploads/1/3/1/6/131636941/wubejokab_robogokorikizit.pdf
    • http://files.theopengate.shop/uploads/1/3/1/1/131164428/jezatozerelurutezu.pdf
    • http://files.laxkiwanis.org/uploads/1/3/1/3/131383727/jonemijidawipuru.pdf
    • http://files.squirrelsnestcreations.com/uploads/1/3/1/3/131379496/biboxamanumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/molapiwije.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/zedegimaveraditilubimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/57835318310.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/vijenipelixozadisuxojuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6561/4234/files/doxoregerobaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/533991065.pdf
    • https://cdn.shopify.com/s/files/1/0428/8551/3379/files/63638565297.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/rajuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8970/6664/files/88792685186.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/tebuligajapagez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/25132242067.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/wijatotegugataworotib.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/62533123243.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_off00005fec.bin
f3382969bafa305e1ed4dca70a74ef95cb8e8e100dcf68f428ab02f23ae8a800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 5256 bytes
font_01_sfnt_off000071cf.bin
2edc9602090319923041536b56ee1adc9409f554d7cbf25003a62a270f1c22ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CF 10580 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.