Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6811c139d0798d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-16 23:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245e27513d599b81112e5e6234ace5ab SHA-1: b6c71419a1213488ce8cd2d697f8cc21b5c075e1 SHA-256: 0a6811c139d0798d43eb0e1051705a7eaf8791b36702048dec69757506b5bcc4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text that appears to be a lure for 'annual report kino indonesia 2015'. The presence of numerous links, including one to a known malicious redirector, strongly suggests a phishing or content-luring attack pattern. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=annual+report+kino+indonesia+2015
    • http://files.lynettewellmeier.com/uploads/1/3/1/6/131606198/2117437.pdf
    • http://files.ironboyexperience.com/uploads/1/3/0/7/130738903/8110990.pdf
    • http://files.highlightgroup.com/uploads/1/3/1/3/131383953/9645581.pdf
    • http://diselel.plaincommunitychurch.com/uploads/1/3/2/7/132712011/086a0.pdf
    • http://sarijewo.partridgehighlands.net/uploads/1/3/1/3/131381886/d63dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7632/1434/files/el_acoso_escolar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/kulegavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/how_to_remove_windows_10_watermark.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/55723718225.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/davis_drug_guide_discount_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/50795298955.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/46905785541.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/gutizagakakowido.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a70.bin
0f611682e66997e43eda984a38156dd84d2ba9d5306e404a01be0b220544bf8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A70 5456 bytes
font_01_sfnt_off00006d0b.bin
e4ad37ee78d8caa5afabeeb9ab57093739e2c355d3e3ebcb9117632ba29c6abe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 10096 bytes