Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9c6a121d662d43…

MALICIOUS

PDF

50.9 KB Created: 2020-08-01 14:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d4f6202ee75ae061dfacbc7e9567260 SHA-1: e75d0ab0de047b391c9c01b29c2c6b3725eb26ff SHA-256: ff9c6a121d662d431fc160e2c2f81dbbc1ba5bb32af20e3cd37a00709ff6e124
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=update+local+branch+with+master, which is flagged as a known malicious redirector. The document body's title, 'Update local branch with master', is likely a lure to encourage clicks on the embedded links.

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.cc/pify?keyword=update+local+branch+with+master
    • http://files.pachamama-yoga.com/uploads/1/3/1/4/131406437/6295115.pdf
    • http://files.agorapublications.com/uploads/1/3/0/7/130775462/lifebi.pdf
    • http://files.ericaamatori.com/uploads/1/3/2/7/132740413/niwejilamubute.pdf
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/71114541796.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/best_legendaries_for_ret_paladin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/pefogejorikedumo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/gasapisagufotoludojer.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/71855971397.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/sojenevixog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/10656680377.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/32549579309.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/76332808262.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/zefatutinelazuritumos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4098/8575/files/49068412319.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_off000079a1.bin
7dfc7f0dac538a1670d08f0a996a20a2abd49630370c675d246ebf22eab153e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 5536 bytes
font_01_sfnt_off00008c50.bin
a9a492d091472c3a4301d4b06390777c17f484f0092a43d45d5e51733e76d4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C50 18728 bytes

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