Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a854ae29c5b8fc…

MALICIOUS

PDF

44.1 KB Created: 2020-08-07 10:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16c99c4b8231d896830aa68a87c83acb SHA-1: 003fb217984862ef07bdc233a88f081b7b411f81 SHA-256: 29a854ae29c5b8fc5b35d7423b8d4748e34950f3d20105e28c6ac89628bed2e7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body text, though garbled, contains the phrase 'E magazine pdf free download', suggesting a lure for users to click on the embedded links.

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=e+magazine+pdf+free+download
    • http://files.candaceclift.com/uploads/1/3/2/6/132695347/9123736.pdf
    • http://files.labordayrodeo.com/uploads/1/3/0/9/130969740/jijedomatejazi.pdf
    • http://files.stettlerhousing.com/uploads/1/3/1/4/131438819/99fa8f2df7d41.pdf
    • http://lubawoga.reshootarchery.com/uploads/1/3/1/1/131163599/lideziwesowe-zapaxovame.pdf
    • http://files.preducationalsolutions.com/uploads/1/3/0/8/130874019/soladip.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/vodawozexula.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/tojadosovataxonojotin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/82683340111.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/28364690462.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/munutijupekobatolixob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/jitaduxiledat.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/vemapizawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/blank_code_pge.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/rebigozuloke.pdf
    • https://cdn.shopify.com/s/files/1/0440/3901/2502/files/hornback_organic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/sisazugaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/39025793892.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_off00006202.bin
df33699f922c76d8ef58f11321aa8985672793b6868643d82d7ac9caf73bec96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 5284 bytes
font_01_sfnt_off00007407.bin
343d25c62d1b2efb3194d67d6f14695d6dc5512ec0111291c15e159c4eb26249
pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 15340 bytes