Malicious PDF — malware analysis report

Static analysis result for SHA-256 f581ed6f4a87d5ee…

MALICIOUS

PDF

56.5 KB Created: 2020-08-03 14:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e282fd5827e4682b60e3c20f5a323b SHA-1: 336794e583decde172168979d5b9187448b585c6 SHA-256: f581ed6f4a87d5eee5e1426cd92dedc64eba04219e1b971d6d86a083c6442aec
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. Additionally, it contains a large number of embedded links, indicating a link farm strategy likely for SEO poisoning or to lure users to malicious sites. The document body contains obfuscated text and embedded URLs, including a redirector URL and several Shopify-hosted PDF 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.ru/pify?keyword=bissectrice+d+un+triangle+pdf
    • http://files.6-sig.com/uploads/1/3/0/9/130969377/6ec8d4e18adb.pdf
    • http://files.bibletimelineqhr.com/uploads/1/3/1/4/131406758/2010e00fbe5.pdf
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdf
    • http://files.escapetothesalon.com/uploads/1/3/1/3/131380299/zowipibaloniwa-jiwedupipokef-rezosifufegofiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/cookie_clicker_auto_click_golden_cookie.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/6636720007.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/gixawajamasolivekuge.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/benoximafutozuwamujusofap.pdf
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/73685830863.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3398/files/wakorizodumasobit.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/furerej.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/fefibawitobuniwilenaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98690712505.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/babalevegolotedopepazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/firegiligesiribexazogumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/nosulurewupiwul.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b51.bin
e8a8b193460ed648efba5701c34a2a84706c17e42e0b567e8ac844da97dfdfc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B51 5144 bytes
font_01_sfnt_off00008cde.bin
fb942efc5d450e11039b9c2fecee1c06b76ed5add0e60911cc562d69f391d085
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDE 10820 bytes
font_02_sfnt_off0000b17e.bin
26ddd33c86de12c045729a51efb3d8435ba1515195a17a4aec020af2bb0c010d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB17E 16076 bytes
font_03_sfnt_off0000c62f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xC62F 4324 bytes