Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf503fd9f469701…

MALICIOUS

PDF

37.2 KB Created: 2020-08-21 19:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2035c99a4da88adcc149128f050a4f3e SHA-1: 1ec4412e095263822e76747e2b405e41dea0adb2 SHA-256: daf503fd9f469701f90d5073b88cb29647af176d1dcf007ce3cb6ff835eec693
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious link is https://ttraff.cc/pify?keyword=elsevier+word+template+2019, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'Elsevier word template 2019', suggesting a lure to trick users into downloading or interacting with malicious content.

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=elsevier+word+template+2019
    • http://files.carnegiepresby.org/uploads/1/3/2/3/132303382/xufogotibujiroj.pdf
    • http://files.liftnrolltowing.com/uploads/1/3/1/4/131452887/824787.pdf
    • http://gofiw.perfecthanginggallery.com/uploads/1/3/0/8/130814297/zojerawimilix.pdf
    • http://files.nicolas-rigaux-photographe.com/uploads/1/3/1/3/131383771/edad06231d.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/46155380474.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/54234577399.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/taxunavivagilavige.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/gebinovawetemojufuzo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/vikufitamiledaxuzo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/forager_skill_tree_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/zegozogerodujopebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/39411128907.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/tangled_movie_clips.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/getigudukogatu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/51276491663.pdf
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/paniziwibipoza.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_off0000538f.bin
abc6fb7aa06a6443279afef5dbf83af2b0710397bea8aa45defbb5cfb95f62ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x538F 5696 bytes
font_01_sfnt_off000066ef.bin
52c176bd00d18ebfe73aca558c9784929f559f3672e7777e76a6df2fe3316d72
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 9760 bytes