Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcddc1d43274fe2…

MALICIOUS

PDF

36.1 KB Created: 2020-08-30 18:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49eb42348b5ddcf4346289ff9e0db5e SHA-1: e163b67367ff89df5f6355304055153a4a0392a9 SHA-256: ffcddc1d43274fe2a66ade7e4abe92cb4951b7be0dd79648cb74518b3a18621f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious link is https://ttraff.com/wix?keyword=pdms+2+manual, which likely serves as a gateway to further malicious content. The presence of numerous other links, many hosted on Shopify, suggests a link farm designed to obscure the true destination or to appear as legitimate content.

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/wix?keyword=pdms+2+manual
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/barter_6_free_sharebeast.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/juluje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/mimamebixerazuwome.pdf
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/todoramupokegililomi.pdf
    • https://static.usrfiles.com/ugd/5ecadc_3a6dd9ef4be045d0a029776f189765e7.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/woxomawuzuronitokedivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7741/files/cactus_irregular_plural_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7396/2145/files/seroma_post_cesarea.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/fmcsa_medical_examiner_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/debivuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/76493166228.pdf
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/ring_of_visibility_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/pidokusimujaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/waiting_for_godot_free_download.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_off00004f3d.bin
53e0d11a3db2f33a5946715e8ea5f9d0e142ae4db89e1822f6afd2bfd1187157
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3D 5008 bytes
font_01_sfnt_off00006034.bin
345395a2b7185cf51e8755380ce381ec2c5ccd0a3077b7e84725c3873fb3b756
pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 10512 bytes