Malicious PDF — malware analysis report

Static analysis result for SHA-256 52545aa6aa7b4d88…

MALICIOUS

PDF

57.2 KB Created: 2020-08-20 12:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd3358b2abb1d9bf109cf05c32587e0b SHA-1: 936a9c7c4971a33b5463371072e6492a11efda45 SHA-256: 52545aa6aa7b4d88f2281f5d24c4babea839b85c68fab5f85ee6d14b14af7912
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=risk+assessment+in+software+project+management+pdf', is identified as a malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, but the link farm and malicious redirector are strong indicators of malicious intent.

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.cc/pify?keyword=risk+assessment+in+software+project+management+pdf
    • http://files.authormattdamon.com/uploads/1/3/0/7/130738741/dotowikagarofun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/puxasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/48682358578.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4417/files/latest_banking_awareness_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/asperger_dsm_v.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/mariner_25_hp_outboard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/95534150159.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/zimimapunada.pdf
    • https://cdn.shopify.com/s/files/1/0439/0223/8875/files/the_celestine_prophecy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6416/3490/files/mh_cet_2020_result_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2517/7512/files/fuxamos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/wafebesawipubezilajoredo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/xibufikivakefunel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/gajofagubanile.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_off00009451.bin
0a9b370b2f5cd2300751c6b2ae4458fabeb4fbc8cbe324bbd2f9223ec78d07ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9451 5472 bytes
font_01_sfnt_off0000a6ee.bin
c7cc0700ced34a7910415ef6bda3af58ae00cf0d8a5d948575a026690165eef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EE 9980 bytes
font_02_sfnt_off0000c917.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC917 4324 bytes

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