Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e11ab08e0fbf66d…

MALICIOUS

PDF

62.5 KB Created: 2020-08-09 13:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba6d721ed95e690eff209af5c83bf091 SHA-1: 5433a2fecb01d59cc65c75bc0962542ea0c03d12 SHA-256: 0e11ab08e0fbf66d437a6978495839efbdfd1e2611c5131780c07e98b8d89a36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to 'Cambridge test for young learners pdf', likely a phishing attempt. 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.com/pify?keyword=cambridge+test+for+young+learners+pdf
    • http://files.fitnessfactory1.com/uploads/1/3/0/7/130739567/3499249.pdf
    • http://files.gafcs.org/uploads/1/3/0/8/130813778/aa40e61b67e.pdf
    • http://ladezif.xclusivebuildersinc.com/uploads/1/3/0/7/130776208/xesuzuxu-sabokeno-lolidixaraji-xurejovimenipa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/tefojekevasato.pdf
    • https://cdn.shopify.com/s/files/1/0430/6599/9511/files/multiply_2x2_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1561/files/reziximulinazipo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/craftsman_8hp_chipper_shredder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/arduino_nano_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5419/files/vasexubosuf.pdf
    • https://cdn.shopify.com/s/files/1/0447/7085/3013/files/contradicting_bible_verses.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/ve_c3_adculo_pela_placa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/56100981285.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/96100436229.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/dotuzuxul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a84f.bin
8c1febf81eed1a6f4e9686d42cfadd1cf408eb7c55868cedf684d505d0c4f706
pdf-font-stream PDF embedded font (sfnt) at offset 0xA84F 5508 bytes
font_01_sfnt_off0000baf8.bin
364f5eb5cccd531abf5e99e5fe1c14da5cfdc7817823edd31bfd3587ccf33e12
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF8 10352 bytes
font_02_sfnt_off0000de60.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 4324 bytes