Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0cb915eec0f9c3…

MALICIOUS

PDF

46.2 KB Created: 2020-08-07 08:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 798100c589e0dc0fe8e6601b38fff83b SHA-1: bfcdea4c70022cd7a54cd36e0b613bd1ba12d21d SHA-256: ad0cb915eec0f9c37756cfb242671662113c83c96759c8da096d2810e2ba5b21
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains text fragments related to 'makkar ielts speaking may 2020 pdf download' and the malicious URL. This suggests a social engineering lure to trick users into downloading potentially malicious content. The file also exhibits characteristics of a link farm, with numerous external 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=makkar+ielts+speaking+may+2020+pdf+download
    • http://files.rothe-photography.com/uploads/1/3/0/7/130740211/gexopolitexu-nabel-warawuwo.pdf
    • http://files.alpveg.com/uploads/1/3/1/4/131438127/xulujuzakunab-nenoxojefeb-wiralipo.pdf
    • http://files.heartofgoldhedgehogs.com/uploads/1/3/0/9/130969614/merudezijofabiv-rubajape-sepiretewirumof.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/35649502991.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/restart_ssh_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/49812249143.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/33650360459.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9308/files/two_s_complement_to_decimal.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/sony_vegas_13_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/6100/8791/files/70278675662.pdf
    • https://cdn.shopify.com/s/files/1/0430/4633/8709/files/sadeperojatoze.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/zekaviwebozababe.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/zilam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/govizatifeze.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/non_associative_algebra_and_its_applications.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006944.bin
a5999ed53bd2fff996530df6e7ecce1bea322efdfe8b3b207fb4e1eca1ed8cec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6944 5688 bytes
font_01_sfnt_off00007ca3.bin
ae7379fec3f2ae94eb7b9d92cc8191d45cbb0ebbfb41dd79fa003d62a9f45503
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA3 9680 bytes
font_02_sfnt_off00009dd5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD5 4324 bytes