Malicious PDF — malware analysis report

Static analysis result for SHA-256 da772f2881f1102c…

MALICIOUS

PDF

30.2 KB Created: 2020-08-17 08:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 891b701463d2b9c6b5dc318084d2f44b SHA-1: 166bd0530b934483f98818037ab05e48a98d41e7 SHA-256: da772f2881f1102c1e952fe430edefedc1d1784596fc3def50141efff7d112b4
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 a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=png+photo+background+image'. The document body, though partially corrupted, contains text suggesting it is related to 'Png photo background image', which is likely a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and drive traffic to the malicious redirector.

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=png+photo+background+image
    • http://vadomamak.dehoniansocialjustice.org/uploads/1/3/1/3/131380582/2670198.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/tft_item_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/stewart_calculus_early_transcendentals_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/binary_multiplication_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/96628635437.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/litekuzesenosiragukita.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/miliseconds_to_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/goodness_of_god_bethel_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/pidemiritiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/smallville_season_1.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_off00003e4b.bin
e9493372ba9b0114066ce667ebf15f3e2f7f4c317d3d23a340720e9dfe7dd91f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E4B 5484 bytes
font_01_sfnt_off000050b1.bin
b30a80aeef9055e1eb34a1e2d83b4f741ce2957d33dcbc5a852fe4efbb216bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B1 8152 bytes

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