Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d6c6baeb3a218e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 08:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 097f35ab3b84984f7e2204997fc7f448 SHA-1: 3121431ab174067b14e785de539412da4dc19d22 SHA-256: 89d6c6baeb3a218e7253254bd58de72134102a2f2a6869c5147532b43cf91d81
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm designed to improve search engine rankings. One critical heuristic identified a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=ovarian+cyst+natural+treatment+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution, under the guise of providing a PDF on natural ovarian cyst treatments.

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/pify?keyword=ovarian+cyst+natural+treatment+pdf
    • http://fovexutar.clcoffey.com/uploads/1/3/1/4/131437363/eef8cde1d74ba.pdf
    • http://files.villagesarcheryclub.com/uploads/1/3/1/4/131437157/zelasete.pdf
    • http://files.ccpropertyinvestment.com/uploads/1/3/2/8/132814071/pujiwisubi.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/2/6/132682883/994320.pdf
    • http://files.hrafna.com/uploads/1/3/1/4/131455283/7030043.pdf
    • https://cdn.shopify.com/s/files/1/0440/8459/2805/files/daily_ui_challenge.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/wefuluvagatofewotowopur.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/tovamogavogesiken.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/71212028188.pdf
    • https://cdn.shopify.com/s/files/1/0438/2353/0141/files/roferonolobojetavaxar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/mazukejoxenun.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/21527446824.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/34605663972.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5738/files/cessna_172s_poh.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/13385296988.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.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_off00005dd1.bin
b4e3e23da70e4e01d8d880fc5e9e452fbd5d18bc1db954a036b05436b446cb39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 5488 bytes
font_01_sfnt_off00007072.bin
daf9df8f3755e5a609505f9f3c18ada7e7c770236648f5b5a21fef763ed6fd8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7072 9608 bytes