Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e447253be41198…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 13:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28132a348e8c9527996d385be506ff06 SHA-1: c57174f419f100642a33562c07b3aa0b831a0636 SHA-256: a3e447253be41198bd872d0e0bf88a9a86caa2fdd605dd0f3c8a7e6103eb2d28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to 'https://ttraff.cc/pify?keyword=create+bookmark+in+pdf+from+word'. This indicates a phishing or redirection attempt, likely to deliver a malicious payload or lead the user to a fraudulent site. The ML classifier also strongly flagged this PDF as malicious.

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=create+bookmark+in+pdf+from+word
    • http://files.neighbourhoodmassage.com/uploads/1/3/0/7/130739415/ccf52.pdf
    • http://files.skydivetofino.ca/uploads/1/3/0/7/130739982/7615713.pdf
    • http://files.hkartcity.com/uploads/1/3/1/4/131437306/sivus.pdf
    • http://files.finewatergems.com/uploads/1/3/0/8/130813973/rafonarozumik.pdf
    • http://files.fushionbeauty.studio/uploads/1/3/2/6/132681303/pegozijowet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/jax_top_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/39895232824.pdf
    • https://cdn.shopify.com/s/files/1/0428/6654/0711/files/52597566199.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/zafalufiwiwumesupata.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/58351165364.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/gimuzeximedofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/wafegukoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/1460418263.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/51038511508.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/acidic_foods_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/mizalukalidumalonek.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/febalezelevusi.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_off00006359.bin
38ec28395e55d440caaa3e254a1c32c1e20b77947172897cb75a0a7e5ed93ec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 5180 bytes
font_01_sfnt_off000074f2.bin
3c70197900bdb4c06accc9949ef53768ddb3c37acdfc30a6f823b01eb4c9fb3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 10228 bytes