Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda74bfeb2b1cb59…

MALICIOUS

PDF

49.0 KB Created: 2020-08-04 21:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1e001238ec7f2c733aafeb658f3e9b SHA-1: 5e9c9edc010c14be99b6b9c4221effe8f6828a26 SHA-256: dda74bfeb2b1cb5959066df984172e511bab3843bf6478e40c076e59e6e97507
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a "dwg viewer convert pdf online" tool. This link redirects to `https://ttraff.cc/pify?keyword=dwg+viewer+convert+pdf+online`, which is flagged as malicious. The presence of a "download button" heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dwg+viewer+convert+pdf+online
    • http://files.scrapthetrappgh.org/uploads/1/3/2/6/132681317/lutuwuzuwegek.pdf
    • http://files.chamonixpatinage.com/uploads/1/3/1/3/131380177/7304951.pdf
    • http://files.shanacinquemani.com/uploads/1/3/0/9/130969915/ninumoruf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/93733067130.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/vifopewirojewoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/91854117829.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/87071217651.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/silalilobaf.pdf
    • https://cdn.shopify.com/s/files/1/0448/0948/6498/files/hsrt_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/bayesian_data_analysis_gelman.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapiguwidekedod.pdf
    • https://cdn.shopify.com/s/files/1/0436/5022/0185/files/49875570087.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/jikuloso.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/64092328185.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_off000067e3.bin
24f10ed6eaf37b684f63bcdbe775c76727201a08f75033592ff834c467e7cf13
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 5084 bytes
font_01_sfnt_off0000796a.bin
17c7c2ec264549c8128ffd91981e41769094d5cb0c9cff252ef59da6680f6450
pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 12600 bytes
font_02_sfnt_off0000a1e9.bin
9d161d6e34f835aff196e226d852edde4d65b072a4902c32411b177d8c29261e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E9 16076 bytes