Malicious PDF — malware analysis report

Static analysis result for SHA-256 983ab4ea4a2ca29a…

MALICIOUS

PDF

62.1 KB Created: 2020-08-23 16:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40934e7c75c8a1a828ef3dece7b1f37e SHA-1: 6abba9c6361967aea466c15de8447af41fed2998 SHA-256: 983ab4ea4a2ca29a0f07f36c7c4ea6f1b99b7e7eca5252b18626513965519c35
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=samsung+s7+software+update+android+9'. This indicates a phishing attempt, likely to trick users into downloading malware or visiting a malicious site. The document body, though heavily corrupted, contains fragments of the same lure. The presence of a large number of embedded links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination.

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=samsung+s7+software+update+android+9
    • http://files.ncbcda.com/uploads/1/3/0/8/130814907/4053286.pdf
    • http://dekoloxi.cyclebavaria.com/uploads/1/3/1/3/131379552/5590668.pdf
    • http://mabod.cityreachswissvale.org/uploads/1/3/1/4/131437502/8650411.pdf
    • http://files.norcalstma.org/uploads/1/3/0/7/130775828/3594297.pdf
    • http://files.emeraldleaf.ca/uploads/1/3/2/3/132302966/zibujutew_mosozu.pdf
    • http://dekoloxi.cyclebavaria.com/uploads/1/3/1/3/131379552
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/32212777189.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/vatax.pdf
    • https://cdn.shopify.com/s/files/1/0437/8574/8642/files/mikat.pdf
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/18842714607.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/96352143133.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/54100544367.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0821/files/fizonesafuweduf.pdf
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/cholera_epidemiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/vehicle_registration_sticker_form_vtr-_60.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/heroes_of_hammerwatch_puzzle_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/bavuxoxipitategujid.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/sawopebuniwir.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/xuruxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/gofozupexijofubavinokog.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_off0000aad0.bin
8c45b6223078fc0d6bfd0f0436d95b54d1089a237ab588bbc033b4891e57f79f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD0 5760 bytes
font_01_sfnt_off0000be6d.bin
c10d244cb743e9bbd054b8cdfebd5e37a21504f77c9673f182b380635c5e9a32
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6D 14032 bytes