Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f45253a07b8fcd…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 21:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f6864ec87489aee8f6216ba22d519b SHA-1: 6e90bf397b54bc37f279000118d37c5ed8aaa07a SHA-256: a0f45253a07b8fcde78f0f96cd67b95b975ab9831effb993676755c3e1bcf664
152 Risk Score

Malware Insights

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

The PDF contains a lure for a "bakery story apk hack" and embeds numerous links, many of which point to a link farm hosted on Shopify. One of the primary links redirects to `ttraff.ru`, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or scam attempt.

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.ru/pify?keyword=bakery+story+apk+hack
    • http://bomanimiz.coolanarneyns.com/uploads/1/3/0/8/130874197/2929304.pdf
    • http://files.5ivecoffee.com/uploads/1/3/2/6/132682905/bidenidusekaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/wavoje.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8657/files/73629739052.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/mataginipakexojojazoz.pdf
    • https://cdn.shopify.com/s/files/1/0462/4708/4181/files/fishing_guide_osrs_members.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/60516708717.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/getiras.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/tajerusezasulipobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/zopebaxafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0948/2658/files/residisiwanezegobasisigen.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/19498226865.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0318/files/3ds_max_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/3679/3237/files/9025471335.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_off000059f0.bin
d63f404a382ffe3ce4a070261030d51aa819c6ff9a40533750c9b6ab4f4f43af
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F0 5204 bytes
font_01_sfnt_off00006baa.bin
e694d209724749f39f626b032f15813254c8d16533d016499c250a43bc94e445
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAA 10420 bytes
font_02_sfnt_off00008f98.bin
ab862ddcc36e5f8abbcc0ec12f45ee2a0a0017beba85073a80867d3ee452b16b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F98 16160 bytes