Malicious PDF — malware analysis report

Static analysis result for SHA-256 227e0bdd1aa5237c…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 06:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f3a33df040b0c5dac41e0dc5e6915d7 SHA-1: 7f478b70fa89ab926b557f017835ec1c0f1c353d SHA-256: 227e0bdd1aa5237cb42cd8814fb4fb2e4d46abf89c2cd26d902498d7db305bc3
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning technique designed to funnel users to malicious content. The document body itself contains garbled text and the URL, indicating it's likely a lure document. No scripts were extracted from this sample.

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=bepantol+derma+solu%25C3%25A7%25C3%25A3o+bula+pdf
    • http://files.eurekasally.com/uploads/1/3/1/4/131405948/suguwusakujale-xadixadipu.pdf
    • http://files.wynnstan.com/uploads/1/3/1/8/131856815/4605644.pdf
    • http://rekose.doritbar-on.com/uploads/1/3/1/3/131379730/6544101.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/13538260145.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/midesegor.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/networking_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/nipemepela.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/wurotorusejomiwanitagige.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/definition_of_digital_literacy.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/nugexiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/ragof.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/76746153532.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/matutunaroxibule.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/jeppesen_instrument_commercial_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_off0000688d.bin
10206aea29a5b05dd3b3e81dd4f5d8177fef548cbf08650ba5a87183807a77e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x688D 5876 bytes
font_01_sfnt_off00007bd9.bin
c5f5b1c51251cd6659114d17f09c2e67286e595c29655fea1932bcceb9b333ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD9 15956 bytes