Malicious PDF — malware analysis report

Static analysis result for SHA-256 b263d8c905a92adb…

MALICIOUS

PDF

53.6 KB Created: 2020-09-08 23:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffde1206d412a86e26560cd6c0076879 SHA-1: cb7675eb07a22903f4f3ac25cd76727a6617eaf1 SHA-256: b263d8c905a92adb878a09cf4d509ea5eea87df62ac4433b0cd264617c312a0c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. One of the primary links, 'https://ttraff.me/pify?keyword=model+view+presenter+android+tutorial', is flagged as malicious. The document body, though partially corrupted, suggests a lure related to an 'android tutorial', indicating a social engineering tactic to encourage link clicks. The presence of a large number of external links further supports the classification as a link farm, often used for SEO poisoning or malware distribution.

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.me/pify?keyword=model+view+presenter+android+tutorial
    • https://static.usrfiles.com/ugd/e1c37d_3398dc37dce04c479494d5d83ed66923.pdf
    • https://static.usrfiles.com/ugd/6cf392_7a176eed2ab0419d84c55febc0cb7883.pdf
    • https://static.usrfiles.com/ugd/2074c9_9129238251c340d99d7277b5a3a5802b.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8a124981949f4cc080039c1f4056f830.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/gejukavekikamulugaguguxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/57576852857.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/naronixasuzon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/88236429254.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/gotodurovakoloravewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/psoriasis_arthritis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/85805958190.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4896/files/31927650505.pdf
    • https://cdn.shopify.com/s/files/1/0431/4402/0125/files/xilikoripefisiroralep.pdf
    • https://cdn.shopify.com/s/files/1/0465/3989/9039/files/33800678102.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_off00009184.bin
26b7d6f33766b3f799aa6d9b2c3f4a235faafa434314f1d384ad4bf9362bf4bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9184 5112 bytes
font_01_sfnt_off0000a316.bin
2f650208953936450b1f0ee51cdc1187af8d2a0577e23b91b78687017c654af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA316 11868 bytes

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