Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8aafb90fc372517…

MALICIOUS

PDF

34.1 KB Created: 2020-08-12 14:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2710627c12271a9c51def27d23b5234 SHA-1: de315274e11a203e9bfc57a860d796cfe7427bec SHA-256: c8aafb90fc372517835b39844062f0b88dbfaaf9563098eb973d144227e7e5d2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm and a malicious redirector URL, indicating an attempt to lead the user to a harmful site. The document body, though partially corrupted, suggests a lure related to 'architecture colleges in Pune PDF'. The presence of numerous external links, many hosted on Shopify, points towards a link farm SEO strategy to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is designed to funnel users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=list+of+architecture+colleges+in+pune+pdf
    • http://rebiwi.garydrakeart.com/uploads/1/3/0/7/130775537/e6d28e.pdf
    • http://kofiwadif.pottersaddict.com/uploads/1/3/1/8/131856372/xovozesexemusim.pdf
    • http://files.mcesmonroe.com/uploads/1/3/1/8/131857315/3475975.pdf
    • http://livezupi.briannadipilato.com/uploads/1/3/0/7/130738970/gamin.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6758/files/wababerofonope.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/1935550036.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/69843072863.pdf
    • https://cdn.shopify.com/s/files/1/0446/7815/2345/files/nixogefovibawedaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/11087425005.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7046/files/tet_paper_1_answer_key_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/duvosaxodazafan.pdf
    • https://cdn.shopify.com/s/files/1/0440/0467/1646/files/21114734607.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/ledubozonizeserirozemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/vehicle_bill_of_sale_louisiana.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/facebook_open_graph.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/temabowenavunimusi.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_off0000480d.bin
33c78f6c063d25ec23c1f715c80da6ab79de56692c2e75f808e4a61bfef7b05a
pdf-font-stream PDF embedded font (sfnt) at offset 0x480D 5360 bytes
font_01_sfnt_off00005a3a.bin
4025b3eccd24fa70ddd712402ee9b212b6127ddb80016a6b2aa89785f2f6eedf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3A 9748 bytes