Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dc68ddd28c526b…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 20:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1aa94ba07f2a16be2b2cd8ae39d24d4 SHA-1: cce19535211ed01b8f63e42cb933fc43106efbf2 SHA-256: 29dc68ddd28c526b9d5b9c5c1c8f1f44e67138b71523897bd7f959110bd00246
154 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=penatalaksanaan+angina+pectoris+pdf'. Additionally, it exhibits a PDF link farm pattern, with numerous links to external PDFs hosted on various domains, including multiple Shopify subdomains. The ML classifier also strongly indicated maliciousness. The primary intent appears to be directing users to malicious infrastructure through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=penatalaksanaan+angina+pectoris+pdf
    • http://files.elegancethroughchrist.com/uploads/1/3/1/3/131379894/7843002.pdf
    • http://files.chelseaforbrook.com/uploads/1/3/2/6/132695339/34dcd9f6d89.pdf
    • http://rodafevu.sacredheartcluster.org/uploads/1/3/0/7/130776046/578e4755897ce.pdf
    • http://kozasi.cbenglish.com/uploads/1/3/0/7/130776031/pemozewepujo_tatobe_febopuwudetija.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/difotojotevafizexapak.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/xaxabuluzijusumukodikijil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/miditomeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/xivadajeguji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/47277991815.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/givepozaroder.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/16520074357.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/gajemif.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_off000068b9.bin
b3dbbff3d7977dbe56d0b2adfd54c0cb42752d47f2151c92c15eeed84ff40fa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 5388 bytes
font_01_sfnt_off00007b1f.bin
b0d4e4ca79a227c61ec9d8fd8e8fd3501fbab058693830e1d56e6439494dbef7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1F 9580 bytes